Graphics file used by games created with the EGO Engine, a race car game engine developed by Codemasters; contains textures for game objects, which may be stored in .DDS, .TGA, or .BMP files; used for racing car skins, track graphics, and other game graphics.

The EGO Engine was used to develop games such as: Colin McRae: DiRT Colin McRae: DiRT 2 Colin McRae: DiRT 3 Race Driver: GRID F1 2010 Operation Flashpoint: Dragon Rising Operation Flashpoint: Red River The textures in PSSG files can be edited using several editors, including the PSSG Editor and the F1 2010 Textures Editor.