| sfar | Mass Effect 3 DLC File |
| sfb | PlayStation 3 Disc Data |
| sfs | KSP Saved Game |
| sga | Aleph One Saved Game |
| sgaa | Aleph One Saved Game |
| sgh | Guitar Hero 3 Setlist Settings |
| sgr | SimCity 4 Graphics Rules |
| sh2 | Stronghold 2 Saved Game |
| shader | Quake 3 Engine Shader File |
| shdc | Armed Assault Shader Cache Data |
| ship | Starsector Ship Data |
| shipworld | Starbound Ship Data |
| shmap | Stronghold 3 Map |
| shpa | Aleph One Shape Data |
| sii | 18 Wheels of Steel Haulin Truck Data |
| sims2pack | The Sims 2 Downloaded Package |
| sims2skin | The Sims 2 Skin Data |
| sims3 | The Sims 3 Saved Game |
| sims3pack | The Sims 3 Package |
| sin | Rise of Nations Data |
| sin | SiN Data |
| sjs | SimCity 3000 Custom Buildings File |
| ske | Battlefield 2 Skeleton Data |
| skse | Skyrim Script Extender Save File |
| slak | Starship Troopers Data |
| slh | Baldurs Gate II Game Data |
| sli | OMSI Spline Configuration |
| slv | GP 500 Game Data |
| sm | Stepmania Song |
| smo | Sumotori Dreams Arena Data |
| smod | Stonehearth Mod Data |
| smpd | Sc2gears Mouse Print Data |
| smskin | StarMade Skin Data |
| smzip | Stepmania Package |
| sns | Burnout Paradise Sound |