{{MTS2}}

'''Savegame (.sc4)''' files are [[DBPF]] files, containing a number of files specific to the city. They can be opened with [[Reader]] and the [[SC4 Savegame Explorer]].

It was long thought that it was impossible to modify savegames because the entries within it are protected with a CRC Checksum.
The game refuses to load certain files if it detects the Checksum of the file is invalid. This means that every modification to a file in the Savegame requires the checksum to be recalculated as well.

The [https://github.com/sebamarynissen/sc4/blob/ee7bee8173ec46d155ceaa316eaab074404dff87/src/crc.cpp algorithm used for the checksum] was discovered by Simmaster07 during his work on the Prop Pox Fix and was picked up by smf_16 to build a proof of concept that Savegames could in fact be edited which led to an experimental fix for ploppable residentials.

==Files Within Savegames==
A file within a Savegame may consist of multiple ''records''.
Almost every record in the Savegame files has the following structure:

<pre>
DWORD	Size
DWORD	CRC
DWORD	Memory
BYTES   All the rest
</pre>
where
 * Size is the length of the record in bytes
 * CRC is the CRC Checksum of the record. This is calculated by running the entire record through the Checksum algorithm, **except** for the first 8 bytes (which is the Size and the CRC itself).
 * Memory is a unique identifier of the record. The game simply uses the numerical value of the pointer to the record for this. Never set this to 0x00000000 or you'll crash the game.

Below follows a list of all files that can appear within a Savegame.
Note that most can be identified by [[Type Id]] alone.
Not every file has been fully decoded yet, although the most important ones such as the [[Lot Subfile]] and the [[Building Subfile]] have been more or less fully decoded.

{|width="80%" border="1" cellpadding="1" cellspacing="1" class="wikitable sortable"
|-
!Type ID
!Group ID
!Instance ID
!Name
!C++ Class
!Status
|-
|ead4ba36
|299b2d1b
|
|
|cSC4CityDetailManager
|
|-
|eac937b4
|
|
|[[Advisor Subfiles#Environmental EAC937B4|Environmental Advisor/Fluffy News Advisor]]
|cSC4Advisor
|
|-
|ea863423
|
|
|
|cSC4GetawayVan
|
|-
|ea3ff4f5
|ea3ff506
|ea3ff4f5
|Separator File
|SC4ReadAppLoadSaveVersion
|Done
|-
|ea230a28
|
|
|
|cSC4SeaportDeveloper
|
|-
|ea19e825
|
|
|[[Advisor Subfiles#Public Safety EA19E825|Public Safety Advisor]]	
|cSC4AdvisorSafety
|
|-
|ea0a5acf
|
|
|
|cSC4PipeConnectionOccupant
|
|-
|ea09d4ae
|
|
|
|cSC4LandfillDeveloper
|
|-
|e9c622d8
|
|
|
|cSC43DRender
|
|-
|e9a6cd3b
|
|
|
|cSC4NetworkLotManager
|
|-
|e990c18e
|
|
|
|cSC4LandValueSimulator
|
|-
|e990c045
|
|
|
|cSC4FlammabilitySimulator
|
|-
|e990bffc
|
|
|[[Budget Subfile]]
|cSC4DepartmentBudget
|Partially Decoded
|-
|e990be01
|
|
|[[Budget Subfile]]
|cSC4BudgetSimulator
|Partially Decoded
|-
|e98f9525
|
|
|
|cSTETerrain
|
|-
|e86b1eef
|e86b1eef
|286b1f03
|[[DIR|Directory File]]
|cGZDBSegmentPackedFile
|Done
|-
|e0d07233
|
|
|[[Ordinance Subfiles|Pro-Reading Ordinance]]
|cSC4OrdinanceProReadingCampaign
|Mostly Decoded
|-
|e0d0722e
|
|
|[[Ordinance Subfiles|Nuclear-Free Ordinance]]
|cSC4OrdinanceNuclearFreeZone
|Mostly Decoded
|-
|cbeb4f62
|
|
|Advisor?
|cSC4Airplane
|	
|-
|cbc14674
|
|
|
|cSC4MySimDispatch
|
|-
|cbb32b0a
|
|
|
|cSC4CarjackedVehicle
|
|-
|ca2c2a2f
|
|
|[[Advisor Subfiles#Utilities CA2C2A2F|Utilities Advisor]]
|cSC4AdvisorUtility
|	
|-
|ca16374f
|
|
|[[Network Subfiles#Network Subfile 2 (CA16374F)|Network Subfile 2]]
|cSC4SubwayOccupant
|Done
|-
|ca15ed6b
|
|
|
|cSC4SubwayConnectionOccupant
|
|-
|ca14ca03
|
|
|
|cSC4AutomataControllerManager
|
|-
|ca09f543
|
|
|Advisor? (The template for the other advisors?)
|cSC4AdvisorBase
|
|-
|ca027edb
|ca027ee1
|
|[[Region View Subfiles|Region View City Data]]
|SC4ReadRegionalCity
|Partially Decoded
|-
|c9efb016
|
|
|
|cSC4PropOccupantBurntBuilding
|
|-
|c9c628ec
|
|
|
|cSC4CameraControl
|
|-
|c9c05c6e
|
|
|[[Network Subfiles#Network Subfile 1 (C9C05C6E)|Network Subfile 1]]
|cSC4NetworkOccupant
|Done
|-
|c9c05c5d
|
|
|
|cSC4PowerLineOccupant
|
|-
|c9bd5d4a
|
|
|[[Lot Subfile]]
|cSC4Lot
|	
|-
|c9b84e10
|
|
|
|cSTETerrainView3D
|
|-
|c990c0a4
|
|
|
|cSC4NeighborsSimulator
|
|-
|c990c034
|
|
|
|cSC4FloraSimulator
|
|-
|c990bd46
|
|
|
|cSC4NetworkManager
|
|-
|c98f9d4a
|
|
|
|cSC4AircraftManager
|
|-
|c98f9d17
|
|
|
|cSC4PedestrianManager
|
|-
|c97f987c
|
|
|
|cSC4LotBaseTextureOccupant
|
|-
|c2f6e81f
|
|
|[[Ordinance Subfiles|Tire Recycling Ordinance]]
|cSC4OrdinanceTireRecycling
|Mostly Decoded
|-
|c2bf1e04
|
|
|[[Ordinance Subfiles|Auto Emission Ordinance]]
|cSC4OrdinanceVehicleEmissionStandard
|Mostly Decoded
|-
|c2bf1dc5
|
|
|[[Ordinance Subfiles|Youth Curfew Ordinance]]
|cSC4OrdinanceYouthCurfew
|Mostly Decoded
|-
|ab72fbb3
|
|
|Signs
|cSC4SignpostOccupant
|
|-
|aa9f4a3d
|
|
|Automata
|cSC4Bus
|
|-
|aa5292d7
|
|
|[[Advisor Subfiles#Finances AA5292D7|Finance Advisor]]
|cSC4AdvisorFinance
|
|-
|aa3fe6bc
|
|
|
|cSC4ParkManager
|
|-
|aa3836fb
|
|
|[[Tutorial Subfile]]
|cSC4TutorialSystem
|
|-
|aa371c32
|
|
|[[Advice Subfiles#Reward aa371c32|Reward Advice Subfile]]
|cSC4RewardAdvice
|
|-
|aa313c9f
|
|
|[[Budget Subfile]]
|cSC4LineItem
|Mostly Decoded
|-
|aa2049a1
|
|
|
|cSC4AirportDeveloper
|
|-
|aa09dc28
|
|
|
|cSC4PedestrianOneShot
|
|-
|a9dd6ff4
|e98f9525
|00000067
|Reconcile Map South Side
|cSTETerrain::SaveEdgeAltitudes
|Almost Complete
|-
|a9dd6ff4
|e98f9525
|00000066
|Reconcile Map East Side
|cSTETerrain::SaveEdgeAltitudes
|Almost Complete
|-
|a9dd6ff4
|e98f9525
|00000065
|Reconcile Map North Side
|cSTETerrain::SaveEdgeAltitudes
|Almost Complete
|-
|a9dd6ff4
|e98f9525
|00000064
|Reconcile Map West Side
|cSTETerrain::SaveEdgeAltitudes
|Almost Complete
|-
|a9dd6ff4
|e98f9525
|00000001
|Terrain Map
|cSTETerrain::SaveAltitudes
|Done
|-
|a9c8647c
|e9c8647e
|00000001
|
|cSC4View3DWin
|
|-
|a9c741b3
|
|
|
|cSC4ModelMaker
|
|-
|a9c05c85
|
|
|[[Flora Subfile]]
|cSC4FloraOccupant
|
|-
|a9bd882d
|
|
|[[Building Subfile]]
|cSC4BuildingOccupant
|Basic Overlay Done
|-
|a9bc9ab6
|
|
|
|cSC4Occupant
|
|-
|a990c08e
|
|
|
|cSC4OrdinanceSimulator
|
|-
|a990c022
|
|
|
|cSC4IndustrialSimulator
|
|-
|a990bfe0
|
|
|
|cSC4LotDeveloper
|
|-
|a990bd10
|
|
|
|cSC4PropManager
|
|-
|a98f9d3b
|
|
|
|cSC4VehicleManager
|
|-
|a98f9d28
|
|
|
|cSC4WatercraftManager
|
|-
|a97f909e
|
|
|
|cSC4ConstructionOccupant
|
|-
|a7e7f929
|
|
|
|cSC424HourClock
|
|-
|a2bf1e43
|
|
|[[Ordinance Subfiles|Clean Air Ordinance]]
|cSC4OrdinanceCleanAir
|Mostly Decoded
|-
|a2bf1de5
|
|
|[[Ordinance Subfiles|Commuter Shuttle Ordinance]]
|cSC4OrdinanceShuttleService
|Mostly Decoded
|-
|a2bf1ddc
|
|
|[[Ordinance Subfiles|Carpool Ordinance]]
|cSC4OrdinanceCarpoolIncentive
|Mostly Decoded
|-
|a0d07129
|
|
|[[Ordinance Subfiles|Legal Gambling Ordinance]]
|cSC4OrdinanceLegalizeGambling
|Mostly Decoded
|-
|8be3753b
|
|
|[[Advice Subfiles#City Situations 8be3753b|City Situations Advice Subfile]]
|cSC4CitySituationAdvice
|
|-
|8ba98eda
|
|
|
|cSC4Helicopter
|
|-
|8b79c707
|
|
|Painted Labels
|cSC4TextDecalOccupant
|
|-
|8a91e7e3
|e98f9525
|00000003
|
|cSTETerrain::SaveMiscTerrainData
|		
|-
|8a91e7e0
|e98f9525
|00000002
|
|cSTETerrain::SaveVertexProperties
|
|-
|8a4bd52b
|
|
|
|cSC4NetworkTunnelOccupant
|
|-
|8a41625a
|
|
|
|cSC4Train
|
|-
|8a2482b9
|4a2492bb
|00000006
|[[PNG]] File
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|8a2482b9
|4a2492bb
|00000004
|[[PNG]] File
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|8a2482b9
|4a2492bb
|00000002
|[[PNG]] File
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|8a2482b9
|4a2492bb
|00000000
|[[PNG]] File
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|8a22bebe
|
|
|
|cSC4LandfillOccupant
|
|-
|8a09f5f4
|
|
|[[Advice Subfiles]]
|cSC4Advice
|
|-
|89efa536
|
|
|[[Historical Graphs Subfiles|Historical Data of City/Graph Data]]
|cSC4HistoryWarehouse
|Mostly Decoded
|-
|89d9b9ee
|69d9b9f1
|
|
|cSC4AutoSaveRecord
|Stores cGZCheatCodeManager::GetCheatCodeSaveData	
|-
|89c49986
|
|
|
|cSC4WealthRequester
|
|-
|89c48f47
|
|
|
|cSC4PropDeveloper
|
|-
|8990c372
|
|
|Mayor View City Data
|cSC4City
|
|-
|8990c12d
|
|
|
|cSC4Demand
|
|-
|8990c09a
|
|
|
|cSC4CrimeSimulator
|
|-
|8990c080
|
|
|
|cSC4CommercialSimulator
|
|-
|8990c065
|
|
|Water Pollution
|cSC4PollutionSimulator
|
|-
|8990be7a
|
|
|
|cSC4BuildingDevelopmentSimulator
|
|-
|896e75af
|
|
|
|cSC4Pedestrian
|
|-
|896e714a
|
|
|Road Construction Automata
|cSC4Vehicle
|
|-
|82b9999b
|
|
|[[Ordinance Subfiles|Power Conservation Ordinance]]
|cSC4OrdinancePowerConservation
|Mostly Decoded
|-
|815b4cef
|
|
|[[Ordinance Subfiles|Junior Sports Ordinance]]
|cSC4OrdinanceJuniorSportsLeague
|Mostly Decoded
|-
|6c1acde1
|
|
|
|cSC4Ambulance
|
|-
|6b70efad
|
|
|
|cSC4MySimBalloonAdvice
|
|-
|6a9335de
|
|
|[[Advice Subfiles#MySim 6a9335de|MySim Advice Subfile]]
|cSC4MySimAdvice
|
|-
|6a5f8755
|
|
|[[Advisor Subfiles#Health and Education 6A5F8755|Health & Education Advisor]]
|cSC4AdvisorHQ
|
|-
|6a3848db
|
|
|[[Advice Subfiles]]
|cSC4AdviceNeghborDeal
|
|-
|6a26d049
|
|
|
|cSC4AdviceSubject
|
|-
|6a1628ba
|
|
|
|cSC4AutomataAttractor
|
|-
|6a0f82b2
|
|
|[[Network Subfiles#Network Index Subfile (6A0F82B2)|Network Index Subfile]]
|cSC4TrafficNetworkMap
|Decoded
|-
|6990c1aa
|
|
|Sims to Jobs Match
|cSC4TrafficSimulator
|
|-
|6990c04f
|
|
|
|cSC4PoliceSimulator
|
|-
|6534284a
|
|
|[[Exemplar|Type 10 Exemplars]]
|
|Decoded.
|-
|62f6e7cf
|
|
|[[Ordinance Subfiles|Tourism Ordinance]]
|cSC4OrdinanceTouristPromotion
|Mostly Decoded
|-
|62bf1db9
|
|
|[[Ordinance Subfiles|Neighborhood Watch Ordinance]]
|cSC4OrdinanceNeighborhoodWatch
|Mostly Decoded
|-
|62bf1daa
|
|
|[[Ordinance Subfiles|Smoke Detector Ordinance]]
|cSC4OrdinanceMandatorySmokeDetectors
|Mostly Decoded
|-
|4c0dd224
|
|
|
|cSC4MayorLimo
|
|-
|4c0ae114
|
|
|
|cSC4FirePlaneDispatchSource
|
|-
|4be372cd
|
|
|[[Advisor Subfiles#City Situations 4BE372CD|Situation Manager]]
|cSC4AdvisorCitySituations
|	
|-
|4a5b69ed
|
|
|Automata
|cSC4TrailerVehicle
|
|-
|4a416254
|
|
|Automata
|cSC4TrainCar
|	
|-
|4a3ad3e1
|
|
|[[Advisor Subfiles#Transportation 4A3AD3E1|Transportation Advisor]]
|cSC4AdvisorTraffic
|
|-
|4a232da8
|
|
|[[Industry Subfile]]
|cSC4BusinessUnit
|
|-
|4a222b98
|
|
|Automata
|cSC4PatrolCar
|
|-
|4a1dbbbf
|
|
|[[Advisor Subfiles#MySim 4A1DBBBF|MySim Advisors]]
|cSC4MySim
|
|-
|4a1b664e
|
|
|
|cSC4AutomataScriptSystem
|
|-
|4a1628c5
|
|
|Wildlife Generator
|cSC4AutomataGenerator
|
|-
|4a0dd616
|
|
|
|cSC4AdvisorSystem
|
|-
|49dd6f4c
|49dd6f4e
|00000001
|
|
|
|-
|49cc1bcd
|
|
|
|cSC4NetworkBridgeOccupant
|
|-
|49c1a034
|
|
|
|cSC4NetworkOccupantWithPreBuiltModel
|
|-
|49c05c9f
|
|
|Lot Retaining Walls
|cSC4LotRetainingWallOccupant
|
|-
|49c05c8f
|
|
|Props
|cSC4FoundationOccupant
|
|-
|49c05b9f
|
|
|
|cSC4PipeOccupant
|
|-
|49b9e60a
|
|
|
|cSC4SimGridFloat32
|
|-
|49b9e606
|
|
|
|cSC4SimGridUint32
|
|-
|49b9e605
|
|
|
|cSC4SimGridSint16
|
|-
|49b9e604
|
|
|
|cSC4SimGridUint16
|
|-
|49b9e603
|
|
|
|cSC4SimGridSint8
|
|-
|49b9e602
|
|
|
|cSC4SimGridUint8
|
|-
|499b23fe
|
|
|
|cSC4COMSerializer::SaveClassObjects
|
|-
|4990c013
|
|
|
|cSC4ResidentialSimulator
|
|-
|4990bd93
|
|
|
|cSC4DispatchManager
|
|-
|498f9b01
|
|
|
|cSC4ZoneDeveloper
|
|-
|42bf1e18
|
|
|[[Ordinance Subfiles|Trash Presort Ordinance]]
|cSC4OrdinanceTrashPresort
|Mostly Decoded
|-
|40d07236
|
|
|[[Ordinance Subfiles|Free Clinic Ordinance]]
|cSC4OrdinanceFreeClinics
|Mostly Decoded
|-
|2b689130
|
|
|Deals
|
|
|-
|2a5f877d
|
|
|[[Advisor Subfiles#City Planner 2A5F877D|City Planner Advisor]]
|cSC4AdvisorCityPlanning
|
|-
|2a134f42
|
|
|
|cSC4NeighborDeal
|
|-
|2990c1e5
|
|
|[[Date Subfile]]
|cSC4Simulator
|Partially Decoded
|-
|2990c1bc
|
|
|Terrain Arrays
|cSC4WeatherSimulator
|Basic Overlay Completed
|-
|2990c142
|
|
|
|cSC4TractDeveloper
|
|-
|2990c05a
|
|
|
|cSC4FireProtectionSimulator
|
|-
|2990bff2
|
|
|
|cSC4DemandSimulator
|
|-
|299062c0
|
|
|
|cSC4LotConfigurationManager
|
|-
|2977aa48
|
|
|Prop Terrain Decal
|cSC4PropOccupantTerrainDecal
|
|-
|298f9b2d
|
|
|
|cSC4ZoneManager
|
|-
|2977aa49
|
|
|Prop Visual Effect
|cSC4PropOccupantVisualEffect
|
|-
|2977aa47
|
|
|[[Prop Subfile]]
|cSC4PropOccupant
|
|-
|22f6e81b
|
|
|[[Ordinance Subfiles|Paper Waste Ordinance]]
|cSC4OrdinancePaperReductionAct
|Mostly Decoded
|-
|22f6e80c
|
|
|[[Ordinance Subfiles|Landfill Gas Ordinance]]
|cSC4OrdinanceLandfillGasRecovery
|Mostly Decoded
|-
|2026960b
|4a2482bb
|00000007
|Temp.[[PNG]] file
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|2026960b
|4a2482bb
|00000005
|Temp.[[PNG]] file
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|2026960b
|4a2482bb
|00000003
|Temp.[[PNG]] file
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|2026960b
|4a2482bb
|00000001
|Temp.[[PNG]] file
|cSC4City::WriteRegionViewThumbnail
|Done
|-
|0c0b06e8
|
|
|
|cSC4PoliceHelicopterDispatchSource
|
|-
|0bf606a5
|
|
|[[Advisor Subfiles#My Street Sim 0bf606a5|My Street Sim]]
|cSC4MyStreetSim
|
|-
|0bb14381
|
|
|
|cSC4CitySituationManager
|
|-
|0b7d45e0
|0b7d45e1
|0b7d45e2
|
|
|
|-
|0a413481
|
|
|Reward Requirements
|cSC4CivicBuildingSimulator
|
|-
|0a134f24
|
|
|
|cSC4NeighborConnection
|
|-
|09c05c6a
|
|
|
|cSC4PowerPoleOccupant
|
|-
|0990c38a
|
|
|
|cSC4Demolition
|
|-
|0990c138
|
|
|
|cSC4GrowthDeveloper
|
|-
|0990c075
|
|
|
|cSC4PlumbingSimulator
|
|-
|0990c005
|
|
|[[Power Simulator Subfile]]
|cSC4PowerSimulator
|Basic Overlay Completed
|-
|0990bdd8
|
|
|
|cSC4AuraSimulator
|
|-
|098f964d
|
|
|[[Item Index Subfile]]
|cSC4OccupantManager
|
|-
|096e75f5
|
|
|
|cSC4Watercraft
|
|-
|02bf1dfa
|
|
|[[Ordinance Subfiles|Water Conservation Ordinance]]
|cSC4OrdinanceWaterConservation
|Mostly Decoded
|-
|00d0723d
|
|
|[[Ordinance Subfiles|Community CPR Ordinance]]
|cSC4OrdinanceCommunityCPRTraining
|Mostly Decoded
|}



{{navbox/SUBFILE}}
[[Category:Savegame]]
[[Category:Modding]]
[[Category:MTS2]]