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The Network Addon Mod (NAM) all transportation network-related fixes, additions and new creations that have been released so far. It adds countless new features to the existing network tools, such as traffic simulator improvements, new overpasses, highway onramps, intersections, pedestrian malls, a ground light rail network, roundabouts and turning lanes. This is the standard release version of the 49th edition of the Network Addon Mod, NAM 49. See below for installation details and a list of new features in the Changelog at the very bottom.  
In memory of Paul Pedriana, Lead Programmer for SimCity 4, who passed away in July 2021 from a sudden heart attack while cycling. Thank you, Paul, for everything--we wouldn't be here without you.   RELEASE NOTES
Before you run off in excitement to install the new NAM version, please make sure to read this document first, to ensure the best Network Addon Mod experience. Note to users of the EA App/Origin: As of June 2023, digital copies of SimCity 4 Deluxe purchased via EA.com, the EA App, or the Origin Store, or played through EA Play/Xbox Game Pass are now properly patched to Version 1.1.641, which means they are compatible with the Network Addon Mod.
 
New Features for NAM 49 See the Changelog below
INSTALLATION AND GENERAL NOTES Before attempting to run the NAM installer, ensure that you have extracted the contents of the .zip download into a folder. Attempting to run the installer while it is still in the .zip will cause the installation to fail. For a complete walkthrough on installation, see the enclosed read-first-NAM-49.html file, or https://www.sc4nam.com/docs/getting-started/   The minimum requirements for running the Network Addon Mod are as follows: A compatible retail copy of SimCity 4 Deluxe Edition OR SimCity 4 with the Rush Hour Expansion Pack:
  Windows/Linux (via WINE): Any digital retail edition, or any disc copy updated to at least Version 1.1.638.
  macOS: Any recent digital edition of the Aspyr port for macOS (installation on the App Store version is more difficult, and the NAM Team is limited in our capacity to provide installation help to App Store users).
  The now-rare non-Deluxe/non-Rush Hour copies of SimCity 4 are not supported. Attempting to run the NAM on a non-Deluxe/non-Rush Hour copy of SimCity 4 will cause the game to immediately crash to desktop (CTD).

  Java Runtime Environment (JRE), in order to run the installer--a version for 64-bit Windows is included in the download (OpenJDK11U-jre_x64_windows_hotspot_11.0.8_10.msi).
  If you are not on 64-bit Windows and need Java, Adoptium's open-source edition is recommended, though JRE and JDK can also be acquired in proprietary/commercial (but free to download) form from Oracle at Java.com.
  The Java Development Kit, or JDK, will also work, but contains extra files not needed unless you are a Java developer.

  A system with the following specs, for each basic type of NAM installation:
  NAM with a LowRAM/NoRHW Controller option: Any system built within the last 15 years, with 750MB available disk space. (Users running this option cannot install the RealHighway (RHW) features.)
  NAM with a Full 4GB Controller option: Any system with a 64-bit operating system, at least 4GB RAM, and 1.2GB available disk space. If on Windows, the 4GB Patch must be applied to the game's executable.
  NOTE: Installing the Full 4GB Controller option without meeting the specifications and without the 4GB Patch will cause the game to crash-to-desktop (CTD) upon attempting to load a city. If you experience this crash, it either means your system does not support the Full 4GB Controller option, or there was some form of failure in the 4GB Patch process.
  Additional Requirement on Windows/Linux (if running Full 4GB Controller/RealHighway options) (not required on Mac): 4GB Patch by NTCore (included in download, automatically installed on Windows with standard installation procedure, and also available at NTCore). See Step 3 (under "On Windows") or the 4GB Patch section in the read-first document for more details.
  Additional Requirement on Mac (optional for Windows/Linux): JDatPacker by memo. JDatPacker is a tool for consolidating folders of SimCity 4 plugins. This can speed up the game's performance, and on macOS, this helps alleviate issues with the Aspyr port's known "number of files limit", wherein exceeding a certain number of files/folders within the game's Plugins directory can cause the game to crash.   To install the Network Addon Mod: Install the Java Runtime Environment (JRE) (if already installed, skip to Step 2).
(This is included in the download package.)
  Remove any existing NAM installations, if present (simply deleting the "a_Network Addon Mod Lite" and/or "Network Addon Mod" folder from the Documents\SimCity 4\Plugins directory is the easiest way).
  Run the NAM Installer: On Windows: If it your first time installing the NAM (or you are installing on a new system/with a new SC4 install), use NetworkAddonMod_Setup_Version49.bat. If you are upgrading from a previous version, or have manually installed the 4GB Patch already (see the 4GB Patch section in read-first), use NetworkAddonMod_Setup_Version49.jar. (The .bat file has a routine to automate the 4GB Patch installation process, necessary to avoid CTDs if running the Full 4GB Controller option, which is necessary to use the RealHighway (RHW) features.)
  On macOS: Run NetworkAddonMod_Setup_Version49.jar. If on the App Store version, the installer cannot directly install into the Plugins location the App Store version utilizes, which is inside the .app file (~/Library/Containers/com.aspyr.simcity4.appstore/Data/Documents/SimCity 4). Install to an alternate location first, then copy the resultant "Plugins" folder into that location. Note that the NAM Team is currently very limited in our ability to provide installation assistance to App Store users.
  On Linux: Run NetworkAddonMod_Setup_Version49.jar, or, if that fails, run NetworkAddonMod_Setup_Version49.sh.

  Follow the installer's instructions, clicking on each tab on the top bar in order:
  Agree to the mod's terms on the initial "welcome" tab to proceed with the installation. Select the options you would like to install under the "files" tab.
  Select the install location under the "location" tab. Unless you have set up an alternate location for your Plugins folder, or happen to be on the Mac App Store version of the game, this should work fine.
  Finally, move to the "install" tab. Click the "Start installation" button to begin the installation process. When the installation is complete, the progress screen will display a message, "All selected components installed!".
  Close the installer, using the "X" button or, on macOS, the red circular button, in the upper right corner of the window. You're all done installing the mod.

  Additional step for Mac users (optional on Windows/Linux):
(Run JDatPacker to consolidate the mod's files.)
  If on the App Store version, run JDatPacker over the resultant Plugins directory, then move the "Network Addon Mod_###.dat" files (wherein "###" is a three-digit number) into the container.
  On the Steam version (or if optionally using JDatPacker on Windows), run JDatPacker on the Documents\SimCity 4\Plugins directory (this will also consolidate your other plugins as well). Make sure you remove the original directories that were consolidated, and, if upgrading or reinstalling your NAM package at any point, ensure you delete any the "Network Addon Mod_###.dat" files from your Plugins before running the new installation. It is recommended that you use a new subfolder (i.e. "Plugins\Compressed Files") instead of installing to the root of the Plugins directory, as this can help prevent mod conflicts.

  Load the game and enjoy the NAM!
  If the game crashes on your first attempt to load a city, this means you have the Full 4GB Controller installed, but either have experienced a failure in the 4GB Patch process, or have an incompatible system (not enough RAM and/or a 32-bit operating system). Either attempt to install the 4GB Patch manually, or choose a less intensive installation option (the Low RAM/No RHW option, or download NAM Lite instead).
  Note that if you've never run the NAM before, and you've picked a fuller installation option, the initial load of the game, and of the first city tile you open may be longer--often quite noticeably. This will shorten with subsequent loads of other cities, or, if you exit and re-enter the game, subsequent re-entries will be quicker.
  If you do not see any icons in game, this most likely means your installation ended up in the wrong location. Either reinstall, making sure the files go into your Documents\SimCity 4\Plugins folder (true of Windows and the Steam Mac version), or, if you're on the Mac App Store version, make sure you copy the files into the .app container.
More details on installation and compatibility can be found in the enclosed read-first-NAM-49.html file.   NAM Lite As mentioned above, an alternative compact version of the NAM is now available, which can be installed instead of the full NAM installation package. The NAM Lite features just the most essential of NAM features, including the NAM's renowned Traffic Simulator Plugins, refining SimCity 4's pathfinding engine to work as it was originally intended, along with Automata Controller options, updated textures (including a Euro/International texture option), Roundabouts, Diagonal Streets, additional interchanges for the game's base Highway system (the "Maxis Highways"), and (optional) Hole Diggers/Ground Raisers, allowing for precise terrain alteration. See here for more details and to download NAM Lite:   DOCUMENTATION For further details on the NAM and its features, visit our new website at:
https://www.sc4nam.com/
Please note that NAM 48 and earlier have been discontinued, and are no longer eligible for any form of technical support. Thank you all for your continued support--hope you enjoy! ©2025 NAM Team

More than 1200 acronyms and technical terms explained Description This is a dictionary of the most common abbreviations, acronyms and technical terms around SimCity 4. It started as my personal notes and since I used the file format of a stand-alone wiki I am sharing it here. I hope it will be useful, particularly to new mayors who try to navigate the SC4 world.  Installation The file is a zipped HTML file. Unzip it and open it with a browser, with JavaScript enabled. Suggestions and Corrections I am sure there is more work to be done. There are aspects of the game that I haven't explored yet and there will likely be things I got wrong. Please share your suggestions and corrections with me in this topic: Thanks to Cori and Cyclone Boom for your advice and input!
simmering

Mod Manager for SimCity 4 plugins. This program handles the process of downloading and installing SimCity 4 plugins, including all their dependencies. It helps you assemble a full Plugins folder very quickly, and also keeps your plugins up-to-date and organized. Usage Prerequisites: Java 17 or later (Windows/macOS/Linux, see Adoptium for details) Mono (macOS/Linux, not needed on Windows) Enough disk space Download: Choose between the desktop application for Windows 10+, the desktop application for Linux, and the cross-platform web-app for other platforms. Verify the checksum of the downloaded ZIP file against the checksums published on Github (optional). Extract the contents of the downloaded ZIP file to any location of your choice. At first launch of the application, it guides you through the initial setup: creating a new Profile and configuring the location of your Plugins folder. Go to Find Packages to search and select packages to install (for example cyclone-boom:save-warning). There are already more than 5000 plugins with compatible metadata to choose from. Once satisfied, go to the Dashboard and hit Update to download and install the plugin files. Files are downloaded directly from Simtropolis or other sites like SC4Evermore, ToutSimCities, SimCityKurier (archived), Hide and Seek! (archived) and GitHub. If you are signed in to Simtropolis, watch out for the “Install with sc4pac” button on the STEX. It appears for plugins that can be installed with sc4pac. Start small and gradually build up your Plugins folder. Don't download everything at once. Install null-45:startup-performance-optimization-dll if you use the Windows digital edition of the game. (This adds support for plugin file paths exceeding the 260 character limit on Windows, which could otherwise be a problem for a small number of packages that use deeply-nested, long file names.) Install memo:lua-sandbox-dll if you use the Windows digital edition of the game. (This provides a more secure environment for your plugins by preventing mods from using unsafe Lua functions.) Be aware that Simtropolis has a download limit of 20 files per day for guests. To avoid this limit, go to Settings and set up your personal authentication token for Simtropolis (step-by-step guide). Alternatively, simply continue the installation process the next day. Plugins folder structure 050-load-first 060-config 075-my-plugins (your existing manually installed plugins) 100-props-textures 110-resources 140-ordinances 150-mods 170-terrain 180-flora 200-residential 300-commercial 360-landmark 400-industrial 500-utilities 600-civics 610-safety 620-education 630-health 640-government 650-religion 660-parks 700-transit 710-automata 770-network-addon-mod 895-my-overrides (your manually installed zzz-folders) 900-overrides Packages are installed into subfolders prefixed by an even number, as the order in which files are loaded by the game is important. This ensures a consistent load order. Files you install manually should be put into subfolders prefixed by an odd number (ideally before 900-overrides). Migrating an existing Plugins folder If you already have a non-empty Plugins folder and want to switch to sc4pac, start by moving the bulk of your manually installed files into a new subfolder 075-my-plugins and your zzz-folders into 895-my-overrides to ensure correct load order. Once you install more and more packages and dependencies with sc4pac, delete the corresponding older, redundant, manually installed files to avoid duplication or version conflicts. If a dependency was installed with sc4pac, there is no need to keep older manually installed copies of it. In the long run, create additional odd-numbered subfolders for better organization of your manually installed files and to fine-tune load order. Managing multiple Plugins folders The sc4pac GUI supports creating multiple Profiles. For example, you could use a unique Profile for each of your Regions. Each Profile corresponds to a Plugins folder. Important: Make sure to select distinct locations for all your Plugins folders to avoid interference between Profiles. You can use the SC4 launch parameter -UserDir:"..." to start the game with a custom location for the Plugins folder. Uninstalling Uninstall all packages for each Profile (see Dashboard → Profile → Delete options). Delete the download cache folder (see Dashboard). Remove the profiles configuration folder (see Settings). Finally, delete the folder containing the sc4pac program files. Documentation Visit the Troubleshooting & FAQ section of the sc4pac Website for more information, or the development & support thread. To make your own uploads installable with sc4pac, see the topic about the sc4pac STEX integration. Credits A big thank you for contributions to sc4pac: @smf_16 @nos.17 @Zasco @Flann @Shadow Assassin @Cyclone Boom @CorinaMarie @Null 45 @Ulisse Wolf @timdmackey.

WARNING! This mod makes drastic changes to the way a city's power plants work. As such, you MUST have bulldozed ALL power plants and any other supported buildings from your cities before installation. Failure to do so can result in a corrupted save game. BACK UP YOUR REGION BEFORE INSTALL. It is recommended that after installing this mod you begin a fresh region with no cities in it. SUPPORT WILL NOT BE PROVIDED IF YOU ARE TRYING TO GET AMPS TO WORK IN AN EXISTING CITY! AMPS makes changes in the way that power buildings are constructed in SimCity 4, requiring the construction of a grid before power plants can be built. It is an extensive overhaul of the power system and takes getting use to, but once you've played it a few times I feel it's very intuitive. Part of the work this mod does is take the Maxis power plants and dozens of optional power plants available on the LEX and STEX and make them integrated into one seamless whole that is organized, user friendly, and well balanced. No power plant is really "better" than any of the others are, because each provides something the others don't. Integration also includes a set of custom icons for the Power Menu that has been completely reorganized to make finding the plant you're looking for easier and quicker, despite having close to a hundred options. Dependencies:
There are NO dependencies in the traditional sense. If you Install AMPS with nothing else, it will work... and you won't be able to build any of the supported power plants, which include all Maxis plants. I designed AMPS to be very dynamic and provide automatic integration of any supported lots you happen to have installed. Certain lots however are essentially mandatory in order to actually do anything. I've called these "hard requirements" and not "dependencies" so as to not cause confusion with such a well-established term. The Hard Requirements are as follows: (please note that most of these downloads do have Dependencies and they are required to use these lots with or without AMPS) Transformer Lots by Kloudkicker - Provides the backbone of the grid. Without them, you can't build much of anything power related.
KK Transformer Lots-Small - https://community.simtropolis.com/files/file/34273-kk-transformer-lots-small/
Substation Lots by Simmer2 - There are many substations, but these three are non-optional as they form the core of early grid construction.
SM2 HV Transformer - https://community.simtropolis.com/files/file/32790-sm2-hv-transformer/
SM2 Main Transformer & Main Transformer with building - https://community.simtropolis.com/files/file/31369-sm2-main-transformers/
Transmission Station by Takingyouthere - The required station to unlock most of the Maxis power plants.
Transformer lot - https://community.simtropolis.com/files/file/31217-transformer-substation/ All other downloads are OPTIONAL. Certain ones expand your options and are referred to as "Soft Requirements." These are as follows:
Needed to build Wind Turbines (such as the Maxis Wind Power Plant)
KK Wind Farm Maintenance Facility - https://community.simtropolis.com/files/file/34196-kk-wind-farm-maintenance-facility/
Needed to have power while you build a grid (these are essentially the only power plants available on Day 1 of a new city)
kaos78414's Generator - https://community.simtropolis.com/files/file/19458-kaos-rusty-generator/
Colyn's CSX Mini Generator - https://sc4devotion.com/csxlex/lex_filedesc.php?lotGET=634 File no longer available on the new SC4E site
Simmer2's SM2 Mobile Power Generator - https://community.simtropolis.com/files/file/31431-sm2-mobile-power-generator/ All lots that are directly supported by AMPS may use the AMPS_Mini_Banner.png in the STEX listings to show compatibility with this mod if they wish. Any questions or issues can be directed to my Development Thread here: https://community.simtropolis.com/forums/topic/760305-mod-amps-development-thread/  

Colossus Addon Mod - CAM Controller is the popular SimCity 4 mod that involves substantial changes in the RCI (Residential - Commercial - Industrial) simulation as well as essential bugfixes. The mod was developed by the various members of the CAM Team who over time have brought modifications to improve this mod Please note that this pack may receive updates in the near future. Do not redistribute without asking first, mostly as doing so would complicate efforts to properly maintain, update, and provide technical support for the pack. Extra feature, if you hover over the folders in the installer, you will get some extra information about each contents WARNING: From version 2.5 onward Colossus Addon Mod works only with the digital version (1.1.641) of SimCity 4 (Microsfot Windows and Linux only). If you run CAM 2.5 or later on systems different from those listed, the mod may malfunction and no support is provided MIGRATION: Migration to CAM 3.0 and later versions can be done if you meet these requirements Players coming from CAM 2.5 can upgrade to CAM 3.0 using only the CAM Controller Players from vanilla can switch to CAM 3.0 using the CAM Controller but must create a new region Migration to CAM 3.0 and later versions cannot be done if you meet these requirements Players coming from CAM 2.1.1 cannot upgrade to CAM 3.0  Players from SPAM cannot switch to CAM 3.0 using only the CAM Controller. Players from vanilla cannot switch to CAM 3.0 if it is used in a developed region Players coming from CAM 3.0 with the CAM-SPAM Controller cannot switch to CAM 3.0 - CAM Controller Players coming from CAM 3.0 with the CAM Controller cannot switch to CAM 3.0 CAM-SPAM Controller If you are installing CAM starting from these given directions it is discouraged not to use the already developed regions as you may experience compatibility problems with edphics, problems with RCI simualtion so it is strongly advised to create a new region to avoid the problems. Installation This package is a simple .zip file. Just extract the a_CAM folder to your My DocumentsSimCity 4Plugins directory (or equivalent, if you have a custom Plugins folder location). It is highly recommended to install this mod through SC4Pac. Manual download is not recommended for less experienced users. DLL Dependencies In order for the contents of this package to display correctly by taking advantage of the new DLL Mods requires the complete installation of the following dependencies(the below listed dependencies are covering a full install; for dependencies for individual collections see the list of contents secion): NONE Dependencies The following files are required in order for the contents of this package to appear correctly (i.e., no "brown boxes" or missing textures) (the below listed dependencies are covering a full install; for dependencies for individual collections see the list of contents secion): SC4 System Integration Module (SIM)
The essential dependence for CAM Colossus Addon Mod - Ordinances
Enhance and expand ordinances Credits The following SimCity 4 community members contributed models, textures, and modding support to this collection: Ulisse Wolf Tyberius06 Cyclone Boom CorinaMarie InvisiChem Indisguise BarbyW Wouanagaine JMyers2043 Shoreman905 Rayden MAS71 Jplumbley Andreas Callagrafx Tropod RippleJet Tag one Memo33 Dragonsteincole xBlaze89x paeng Pegasus This package was assembled by Ulisse Wolf. Special Thanks Webmaster & administration staff at SC4Evermore and Simtropolis. And possibly others who may not have been mentioned. If your name has been forgotten or you're not on the list, then drop us a line, as it has been difficult to keep track of anyone/everyone that may of helped somewhere along the lines. And to the community itself, we would also like to thank you for your support, making mods such as this possible too. We're still at it after 20 years thanks to you! And last but not least, a thanks for the Maxis individuals too, for the [paid] work that they did. ;-)

The Coastal Development Kit 3 (CDK3) Collection is a collated package of all of the previous CDK3 downloads released by Pegasus Productions. Rather than download and install a large number of packages, it is now possible to get everything you need in just one single self-contained download, including all required dependencies. The installer package allows you to simply select those parts of the CDK3 theme you want, then it will smartly install only those dependencies that are required to use them. After making your selections and letting the installation complete, you can go straight in game and just play with all the fantastic content, no need to mess with anything further. The installer handles everything automatically, so say goodbye to the stress of installing such modular sets and tracking down dependencies and hello to better coastal views in SimCity 4. A huge thank you to Pegasus for giving permission to repackage everything in this manner, helping to make content more accessible into the future. Every CDK3 package, previously over 130 separate downloads, has been organized by their themes, for example the Seaports, Marinas and so on. You can customize exactly which specific parts of each CDK3 theme you want and select from any relevant options. The installer will then install your choices and automatically handle all related dependencies. Literally the CDK3 in its entirety is now installable in a small fraction of the time it used to take. Better still, we've ruthlessly optimised the process, ensured no duplicate files exist and made everything more consistent, so the installation and your Plugins folder is kept neat and tidy. Note that because this package was taken from what were originally many separate downloads, rather than try to merge all the Readme's into one place, we've kept them separate, but all the included options are are installed for reference. Please note all the Readmes are located inside of \Documents\SimCity 4\PEG Readmes, so they don't clutter your Plugins folder. This package requires no external dependencies. All discussions and support for this product are now hosted on the PLEX on the STEX - Community Support thread at Simtropolis   !!! Functional Seaports / Seaport Controller - IMPORTANT INFORMATION !!! If you choose to install one or more of the Functional Seaport lots, use of them will require that the Pegasus Seaport Controller is installed. Note that this will replace the in-game seaport in the Water Transit menu. !!! It is imperative that you do not install more than one Seaport Controller - failure to adhere to this warning, could prevent you from opening your cities and render them useless. !!! By installing the controller, you are confirming that you have no other Seaport Controller installed. To avoid conflicts that could prevent you from being able to load your cities, you should never use any other functional Seaport Mod or Lot, except those supported by this package, which are as follows: If you are unsure if you have any unsupported Seaports, we strongly suggest testing them in a new, blank test city first. If you can Plop the Seaports, save, exit and reload the city all without issue, then you should be safe to use them in your existing cities. Additionally, we recommend making a backup of your Regions BEFORE using any of the functional Seaports, this way if something does go wrong, you have a way to fix the problem. We can not be held responsible for your failure to read, understand or follow the advice here. Whilst this is necessary due to the way the game works, there really isn't anything to worry about, provided you never install more than one such controller, but the warnings are here because if you do, the consequences are not good. Users with pre-existing CDK3 installed The package was originally designed for new users of the CDK3, given that it's main purpose was to simplify the installation, that doesn't really do anything for those with existing installs. However, a Cleanitol RemoveList is attached here, which should be ran before running the CDK3 Collection Installer, will find and remove all the original CDK3 content from your Plugins folder: RemoveList - CDK3 Collection.txt

This set of files provides SimCity 4 players with additional choices for the slope parameters of surface transportation networks in the game. This collection of slope mods was designed by @Lucario Boricua, author of the Earthworks Tutorials series. Extensive research was conducted for both other slope mods and the findings of previous precision terraforming pioneers, most notably BigRedFish and Ennedi, as well as geometric design characteristics of real transportation networks, to best harmonize playability and realism. As these are beta versions, players are strongly encouraged to provide their feedback, to fine-tune later beta versions and eventually complete an official set of NAM tunnel and slope mods! Make sure to read the provided ReadMe file for installation instructions, and to get detailed information on the slope parameters of each variant.
  GENERAL CHARACTERISTICS OF PROVIDED SLOPE MODS
This modpack is provided in six (6) additional flavors in decreasing steepness, such that steeper settings are termed as easier to use, along with a small modification of the Maxis default settings. Aside from the Maxis Default options, all the others are provided as both a single file with all the surface networks and separate files to mix and match different settings. Certain properties are universally shared by all these slope mods, including the adjustment of the height of the RealRailway tunnel portal, increased from 7.25m to 7.50m (including the Maxis Default settings). The other slope mods also share these other properties: NEW! NAM DLL Compatibility for Street Tunnels: the street network tuning parameters were modified to enable compatibility with street tunnel functionality introduced by the NAM DLL (found here). When using the NAM tunnel and slope mod, make sure to remove the street slope mod file included in the NAM-dll-supplemental-files folder. The NAM Tunnel and Slope Mod, on its own, does not enable street tunnels! NEW! Modified Subway and Water Pipe Depth parameters: the modified parameters enable players to build the Subway and Water Pipe networks regardless of steep changes in topography (ex. cliffs, mountains or canyons), using parameters adapted from the Underground Depth Mod by Thalassicus. Construction animations: all construction animations have been sped-up by a factor of 6, reducing the wait time from first drawing/dragging a network, until the construction animation concludes. Smoothing progression steps: all surface networks have their smoothing progression steps increased to 4096 steps, in 1-cell increments. This ensures the game calculates the network’s slope conformance to a much greater degree than the game default settings. Realistic relative steepness by base network: all the steeper variants (Very Easy/Very Steep, Easy/Steep, and Moderate Vanilla) have decreasing steepness in the following order: Street Road, One-way, Avenue and Tram dual networks Elevated Highway, Ground Highway, RealHighway and El-Rail/Ground Light Rail Rail and Monorail The flatter variants (Moderate NAM, Strict / Flat, and Realistic / Very Flat) instead use this flatness and vertical curvature sequence, more closely approximating the relationship between real transportation network geometries: Street Road and One-way Avenue (same max slope but smoother vertical curvature compared to Road and One-way) Elevated Rail / Ground Light Rail Elevated Highway, Ground Highway and RealHighway Monorail Rail / Hybrid Railway Integer numbers of cells for key height differences: SimCity 4 slope parameters are inputted in degrees (°), rather than the height change per cell (m per cell, or ft per cell), percent (%, typical of roadways) or permille (‰, typical of railways) grades. The values in degrees were selected such that the runs required to cover 7.5m (all networks), 15.0m (road networks) or 15.5m (rail networks) are whole numbers of cells, allowing players to get an intuitive visual estimation of the network slopes for a given segment’s length. This set of files contains 6 additional slope mod variants, and a small modification of the Maxis default slope parameters. In decreasing steepness, here they are: 00 – Maxis Default: The Maxis Default slope mod settings do not alter any property of the slope parameters of any transportation network, apart from the height of the RealRailway tunnel portal. Players who do not wish to install any flatter slope mod options are advised to use this one, to ensure the terrain correctly matches the railway tunnel portal heights. 01 – Very Easy or Very Steep: The Very Easy or Very Steep slope mod settings provide a minimal reduction of the maximum slopes of the networks, providing a minor smoothness improvement compared to the game default properties. Players who do not want transportation networks to interfere with their gameplay, but who still want a visual improvement of their transportation networks, are advised to use this variant. This one does not use vertical curvature settings, and as such is not subject to the rollercoasting effect, the phenomenon in which wavy networks when transitioning from a steep slope into a flat terrain. 02 – Easy or Steep: The Easy or Steep slope mod settings provide a small but significant reduction of the maximum slopes of the networks, providing somewhat more of a smoothness improvement compared to the game default properties. Players who want good-looking transportation networks and get properly introduced to slope mods in their gameplay are advised to use this variant. Players who regularly play on rugged topography with minimal precision terraforming are also advised to use this variant. This one does not use vertical curvature settings, and as such is not subject to the rollercoasting effect. 03a – Moderate, Vanilla Style: The Moderate, Vanilla Style slope mod settings provide an intermediate reduction of the maximum slopes of the networks, providing a clear smoothing of the networks, achieving a balance between ease of gameplay and realism. Players who have some experience with slope mods are advised to use this variant, unless they are using it on existing cities built over rugged terrain and numerous parallel networks. This one does not have vertical curvature, and as a result will look slightly steeper than the smooth height transitions and FLUP portals provided as part of the Network Addon Mod. This one is the flattest option in which both Rail and Monorail share the same slope, for ease of gameplay purposes. 03b – Moderate, NAM Style: The Moderate, NAM Style slope mod settings provide an intermediate reduction of the maximum slopes of the networks, providing a clear smoothing of the networks, achieving a balance between ease of gameplay and realism. Contrary to its Vanilla counterpart, this one does feature vertical curvature, on all networks except for Street, Road and One-way. The result is that network slopes will be identical to the smooth height transitions. Players who have some experience with slope mods are advised to use this variant, unless they are using it on existing cities built over rugged terrain and numerous parallel networks. Given that this one does feature vertical curvature, the rollercoasting effect does occur. It can be mitigated by anchoring the ends of a network segment by placing road or rail squares, the network won’t build until the distance is sufficient to accommodate the maximum slope and the vertical curvature. This option is the steepest which features a flatter Rail slope and a steeper Monorail slope, for realism purposes. Both monorail and dedicated high speed railway networks support steeper gradients compared to conventional railways, owing to the weight of trains (heavy freight trains require flatter grades) and propulsion systems. Monorail and HSR trainsets generally feature Electrical Multiple Unit designs, in which each bogie (set of wheels) has its own separate motor for distributed propulsion and greater acceleration/braking capacity. 04 – Strict or Flat: The Strict or Flat slope mod settings trend towards realism, with slopes flatter than the equivalent smooth height transitions and FLUP portals provided with the Network Addon Mod. This is also the steepest slope mod setting in which nearly all the networks feature vertical curvature, excluding the street. Faster networks will have smoother vertical curvature, which correlates with required sight distances (faster travel requires greater visibility for vehicle operators to react safely). These slope mod settings are recommended for players who want highly realistic network designs and greater challenge in building across rugged terrain, with flatter networks forcing them to choose their alignments more carefully. Novice transportation players are advised not to use this slope mod if they want to avoid frustration. They are advised to use it if wanting to learn how to use them to their best potential! 05 – Realistic or Very Flat: The Realistic or Very Flat slope mod settings use values nearly identical to those found in real transportation network geometric design, resulting in really flat networks. Transportation power players and players accustomed to precision terraforming will likely find these settings to be challenging, even for flatter terrains. A more advisable option would be to select a few network-specific slope mod files for those cases in which realism is desired, otherwise general gameplay may be impaired by requiring long stretches to climb even small elevation differences. The NAM team does not assume responsibility for players who choose this setting and complain about the inability to build networks!   INSTALLATION INSTRUCTIONS Download the provided compressed .zip folder and unpack the contents. Inside the folder, you'll find the different steepness variants in their respective folders, alongside the ReadMe file. Each steepness variant folder contains the sample screenshot of the slope mods, and two sub-folders: one for the full set of slope mod values, and another for the slope parameters separated by base network. Depending on the preference, follow the instructions depending on whether you want to install all slopes of a single variant, or if you want to mix-and-match different slope settings by base network. A) Single set of slope mod values
Players who wish to use a slope mod set as provided should copy the corresponding full set folder into their Plugins folder, that is, the file named zNAM_TunnelSlope_##_SlopeDescription_FullSet. The file is named such as to supersede both the game’s default slope mod settings, and if installed, the RealRailway slope parameters provided as part of NAM installations. Players should make sure to remove other slope mods, to ensure they don’t load after this mod. B) Mix-and-match of various slope mod values
Players who wish to combine different slope settings for each network should create a folder in Plugins, zNAM_TunnelSlope_Custom. To it, copy one steepness setting for each network. Any network without a slope mod file will behave like the game default, or like any other slope mod loading first in the file order. To ensure completeness, this is the list of supported networks, in alphabetical order: AVENUE: Affects the Avenue, Avenue-based override networks (ex. Avenue elevated viaducts) and tram dual networks containing Avenue, such as Tram-Avenue and El-Rail over Avenue. This one also affects the Avenue-based overrides of the FLEX Turn Lanes (FTL). ELEV_HWY: Affects the Elevated Highway, either Maxis or Maxis Highway Override. EL-RAIL: Affects the Elevated Rail network, and the Ground Light Rail network. GROUND_HWY: Affects the Ground Highway network, either Maxis or Maxis Highway Override. MONORAIL: affects the Monorail network, and Monorail-based override networks, including the High-Speed Rail Project (HSRP) and the Bullet Train Mod (BTM), but not the Hybrid Railway (HRW). ONEWAY: affects the One-way Road and the OWR-based override networks, including OWR-1, OWR-3, OWR-4 and OWR-5, which are part of the Network Widening Mod. RAIL: affects the Rail network, be it the game’s default railway, the RealRailway, and the Hybrid Railway (Rail-Monorail dual network). RHW: affects the RealHighway network, in all width and height variants. Players doing mix-andmatch are advised to use a steeper RHW setting to accommodate the ramps, and to smooth the mainline alignment with a flatter network, for a smoother appearance and easier construction. ROAD: affects the Road and Road-based override networks, including the Elevated Road viaducts and the bidirectional Network Widening Mod networks (AVE-2, TLA-3, ARD-3, NRD-4, RD-4, TLA-5, RD-6, AVE-6 and TLA-7). It also affects road-based tram dual networks (El-Rail over Road, Tram-in-Road, Tram-on-Road). This one also affects the Road-based overrides of the FLEX Turn Lanes. STREET: affects the Street and Street-based override networks, including all the Street Addon Mod (SAM) options, and street-based tram dual networks (tram-on-street).   LICENSING
Users download, install, and run this mod completely and solely at their own risk. Electronic Arts (EA), the creators, and its individual contributors, are not responsible for any errors, crashes, problems, or any other issue that you may have if you have downloaded and applied this mod file to your game. The use of this document, the information within, and the Network Addon Mod is conditional upon the acceptance of this disclaimer and all that is within this document. This mod is provided as free content to SimCity 4 players, who are free to modify it for their use. Considering this is a beta version, users are strongly encouraged to provide their feedback to the NAM team, and specifically to Lucario Boricua, for the further improvement of later beta versions, and the eventual creation of official versions of this mod.

CoriBoom™ Productions  Proudly Presents...  MySimtropolis:  Simtropolis Members immortalized in SimCity 4!  In our 1st official CoriBoom™ release to the STEX, @CorinaMarie and I have humbly created a mod collectively designed for everyone here at Simtropolis. I'm sure many of you will have heard of MySim Mode in SC4. The idea being to establish up to 5 Sims per city, giving them a place to interact and see how they feel and respond to their surroundings from speech balloons. However, it really only serves as a secondary aspect of the simulation, and doesn't directly influence gameplay mechanics. It's possible to select from a list of 21 predefined characters, or import those you've made yourself from The Sims game. This is all well and good. But in the grand scheme of things, it may seem a bit of a non-personable side show, and not so much everyone's idea of fun. But fear not, that's where MySimtropolis comes in, allowing community profiles to be immortalized and played as visible characters in the game. Find a house, take up a job, and watch your Sim live, work, and play. This could be inside a ritzy suburban estate, a glitzy skyscraper tower, somewhere hidden amid a town called Middle Of (near Nowhere), on an idyllic remote island, an amazing castle town, or even on another planet! It's completely up to you...   Total of 223 Members Included  (So Far) Following the Sign Up thread, we announced the successful breakthrough technical development of a hex editing method. This has allowed data to be imported in the MySim entry format recognised by the game, adding each to the selection panel. There's a seemingly unlimited number of places, and so we've asked members to volunteer and have their ST identity preserved in our mod. The profile for each MySimtropolis Sim consists of: Avatar Name Gender Zodiac
As of this update (14 Dec 2025), the following members are included as part of this initiative:   Installation  IMPORTANT:  The main files must not be installed inside Plugins, unlike regular SC4 content!  
Inside the zip file there is a readme document and 2 folders: MySim
Copy entire contents to: C:\Users\UserName\Documents\SimCity 4\MySim
This contains the avatars of each Sim as 36x41 BMP files, each featuring TPPT corner transparency. Most essentially it also contains a file named MySims.dat which is the 'brains' behind all the functionality being the hex data.

If the "MySim" folder doesn't already exist, it needs creating at this location.

Note: For the Aspyr/App Store Mac version, this MySim folder must be created at:
/Users/UserName/Library/Containers/com.aspyr.simcity4.appstore/Data/Documents/SimCity 4/MySim

  Locale  (Recommended)
Copy included file to: C:\Users\UserName\Documents\SimCity 4\Plugins
This is an optional file named MySimtropolis_Rulez.dat which serves as an overhaul to the MySim Mode. (See details below for more info.)

Note: For the Aspyr/App Store Mac version, the Plugins folder is located at:
/Users/UserName/Library/Containers/com.aspyr.simcity4.appstore/Data/Documents/SimCity 4/Plugins
Thanks to @c4bl3fl4m3 for clarifying the Mac details!   The Selection Panel Here is where all the MySims can be viewed. There are 3 rows of 7 per page, and they're all listed in sequence as per the order of immortalization for those who've signed up. As follows:
The pages can be navigated by clicking each number, and over on the left side there are filter options to sort alphabetically, by gender, or zodiac sign.
Please Note: Although we've made every effort to ensure data entry is correct, we are human and it's possible there are mistakes. Should you notice anything in error or wish to request an avatar amendment, feel free to post in the main thread, the comments below, or send us a PM to let us know. Thanks!   MySimtropolis Rulez  (Recommended) This is an added bonus which transforms the display of the MySims Mode. The most notable feature is by removing all default Sims from the selection panel. It also renames titles and labels in the menus. It's not required for the MySims to be displayed in the game, but for added authenticity it's something we recommend using too. In Summary: Prevents the default MySims from displaying for selection. Renames "My Sim Mode" to "MySimtropolis Mode". Renames "Select A My Sim" to "Select MySimtropolis Member". Renames "My Sims" to "Resident <CityName> MySimtropolis Sims". Plus over 20 other locale edits in-keeping with the MySimtropolis idea.   Note: As an alternative to the main Rulez file, there's also a "Less Rulez" edition available here. Use this version instead if you wish to preserve the 21 built-in Sims as well.   You can join too! You may have just become aware of this mod, and at this point might be wondering if you can also be immortalized as a MySim. The good news is it's not too late, nor is there a deadline to join yourself. The idea is anyone can post and be included in the next available slot just like everyone else. Sign up in this thread: You can be next...
We'll then release periodic updates to this file entry here on the STEX, including those newly immortalized who are equally welcome to be part of this as well. We plan to do this in batches, aiming for around a weekly basis (time dependent of course on our other current commitments).
Want to share your MySimtropolis pics? Post in the dedicated Show Us Your MySimtropolis Sims topic.
Interested in the technical details as a quick and efficient means of adding your own MySims? View this thread:
MySims.dat - The Techy, Hexy Details
As a little bonus... Additionally, everyone who signs up to be included receives a special commemorative profile badge. As follows:   Future Idea In due course as hinted about here, we've got an additional mod planned, expanding on the usefulness of MySims to measure simulation factors with greater accuracy. Stay tuned!   Special Thanks From what started as something prospectively small, the response to our idea has been overwhelmingly positive and kind. Cori and I both agree this reception and feedback already fully exceeded our expectations. We're truly grateful for everyone who has decided to get involved, and anyone who still wishes to do so. Thanks to each and every one of you. MySimtropolis quite simply wouldn't have been possible otherwise, and this release is our gift to you all.
// CoriBoom™ Productions Release \\
MySimtropolis v1.223 — (14 Dec 2025) .myst-format { background: #235F92 !important; color: gold !important; padding: 0px 10px 0px 10px !important; text-shadow: 1px 1px 0px #333333; box-shadow: 1px 1px 0px 0px gold; margin-top: 5px; }

This DLL plugin activates two cheat codes that allow you to freely change the camera angles of the game. This allows you to use SimCity 4's 3D engine to its full potential and experience your cities from completely new angles. Just for fun. It solves many of the issues of the original (now deprecated) 3D Camera Mod by pcwhiz24. System requirements SimCity 4, version 1.1.641 (the digital release) (more info) Windows 10+ or Linux Installation Copy the DLL into the top-level directory of either Plugins folder (place it directly in <Documents>\SimCity 4\Plugins or <SC4 install folder>\Plugins, not in a subfolder). Usage Open the cheat console with CTRL + x and enter the CameraYaw or CameraPitch cheats: CameraYaw <angle> - set the azimuth angle (counter-clockwise) CameraYaw - reset the angle to the default of 22.5 degree CameraPitch <angle> - set the altitude angle for all zoom levels (range: 0.0 to 90.0 degree) CameraPitch <angle 1> .. <angle 5> - set the altitude angle for zoom levels 1 to 5 individually CameraPitch - reset the angles to the default for each zoom: 30°, 35°, 40°, 45°, 45° Examples top down view: CameraPitch 85 and CameraYaw 0 isometric SC3k-style view: CameraYaw 45 Sometimes the effect only fully applies after changing zoom level or rotating the map, particularly on zooms 5 and 6. Graphical glitches may occur, especially with the more extreme angles. To avoid rendering the region view of a city from a non-standard angle, use Fast-Save (hold ALT + press Save button) or reset the angles to the default values before saving. Source code Available on GitHub.

What does this do? Fixes a serialization bug that could corrupt the savegame, particularly when mods are installed that modify existing exemplars (i.e. Prop Pox). Resolves a crash-to-desktop when hovering NAM puzzle pieces over transit-enabled lots. Allows other DLLs to load into SC4's memory without a GZCOM framework. Requirements
This fix is made for versions 640 and 641 of SimCity 4 on Windows. Version 640 is a fully-patched SC4 retail copy, and version 641 is a fully-patched digital distribution version (i.e. Steam, Origin, GOG). Although v641 is supported, it has only been officially tested on Steam. Installation
Unzip to Documents\SimCity 4\Plugins. To see if SC4Fix is working properly, check the title of your game window. If you are playing in fullscreen mode, alt-tab out and hover over the SimCity taskbar icon. The titlebar will show "SC4Fix (version #)" if loaded properly. Repairing cities already affected by Prop Pox
Thanks to kingofsimcity for these instructions: In the region view, open the graphics settings and change City Detail to Low. Close and relaunch SC4. Open the offending city tile and save immediately. Exit to region without saving and change City Detail back to High. Close and relaunch SC4. Open the offending city tile and save again. Demonstration
Click here for a video showing the ability to hover puzzle pieces over transit-enabled lots with this DLL. Development Thread and Source Code
Development Thread
Source Code