| sqh | Harbinger Game Data |
| sqm | Operation Flashpoint Mission Data |
| sqs | Operation FlashPoint Script |
| srb | Sonic Robo Blast 2 Game Data |
| src | Infinity Engine Out-of-dialog Data |
| srdi | Danganronpa V3 Model Data |
| srdv | Danganronpa V3 Image Data |
| srk | Sub Rosa Client File |
| ss | XShipWars Sound Scheme Data |
| ss0 | Splinter Cell: Pandora Tomorrow Game Audio |
| ssa | Children of the Nile Campaign Data |
| Empire Earth Custom Assets Data |
| ssc | Stepmania Song Data |
| ssf | Bioware Aurora Sound Set File |
| ssfrec | Super Smash Flash 2 Recording |
| ssfsav | Super Smash Flash Saved Game |
| ssg | Sonic Robo Blast 2 Saved Game |
| ssh | Cricket 2005 Game Data |
| ssl | Fallout Game Script |
| ssq | Dance Dance Revolution Song |
| sss | Heart of Darkness Saved Game |
| Sudden Strike Saved Game |
| sst | Children of the Nile Textures Data |
| ssv | ShadowFlare Saved Game |
| Snood Saved Game Data |
| st | Homeworld Game ST Data |
| st3 | SimCity 3000 Starter Town City Data |
| stage | 2D Fighter Maker 2nd Stage Data |
| starpak | Titanfall 2 Game Archive |
| staticmesh | Battlefield 2 Static Mesh Data |
| stb | ROSE Online Game Data |
| stbsp | Titanfall 2 Game Map |
| stg | Visual Pinball High Scores Data |
| stk | Rail3D Stock and Scenery Model |
| stl | ROSE Online 3D Model Data |
| SuperTux Level Data |
| stm | The Powder Toy Stamp File |
| stn | Microsoft Flight Simulator Data |
| sto | Infinity Engine Store Data |
| stormreplay | Heroes of the Storm Game Replay |
| stp | NASCAR Racing 2003 Track Picture |
| str | FIFA 2002 Music Data |
| X-Plane String Data |
| stream | Warhammer: End Times - Vermintide Bundle Data |
| stsg | SuperTux Saved Game |
| stuff | Black and White 2 Data File |
| Black and White 2 Path Data |
| Black and White 2 Wall Data |
| EVE Online Data File |
| stwm | SuperTux World Map |
| stx | Delta Force Sound Text Xref Data |
| stype | Call of Duty Texture Data |
| sub_loc | Submachine Universe Location |
| sur | Freelancer 3D Collision Zone Data |
| sv | Roland Garros Tennis SV Data |
| sv1 | RollerCoaster Tycoon Saved Game |
| sv2 | RollerCoaster Tycoon Saved Game |
| sv3 | RollerCoaster Tycoon Saved Game |
| sv4 | RollerCoaster Tycoon Saved Game |
| sv5 | BigJig Saved Puzzle Data |
| Locomotion Saved Game |
| RollerCoaster Tycoon Saved Game |
| sv6 | RollerCoaster Tycoon Saved Game |
| sv7 | RollerCoaster Tycoon Saved Game |
| sv8 | RollerCoaster Tycoon Saved Game |
| sv9 | RollerCoaster Tycoon Saved Game |
| svb | Torchlight 2 Saved Game |
| sve | Carmageddon: TDR 2000 Saved Game |
| Civilization Saved Game |
| Fallout 2 Subtitle Data |
| Simutrans Saved Game |
| svh | Fly! Simulated Vehicle Specification Data |
| svi | Red Faction Game Data |
| svs | GameBoy Advance Saved State |
| Need for Speed: World Vinyl Setup Data |
| svt | Torchlight Saved Game |
| swar | Super Mario Bros NDS Music Data |
| swd | Settlers II World Map |
| swe | NHL 2002 Game Data |
| swm | Syndicate Wars Maps Data |
