Mods are free. its a 3d game, not 2d simetric camera. Prepare your video graphics board, the game is processor and graphics intensive. keep an eye in forums to get more information about, mods updates and crashes. This game has a mod community with awesome contributors, but lot of trash and outdated assets. Steam workshop for C:S is completely big, but there too many good things there. Unity engine is used then, take your own conclusions. BTW the game is cool, but without mods, is nothing.