| SirBuildsALot | Developer | |
| SirFranz | Developer | |
| SirJaeline | Developer | |
| SirMatthewv | Developer | |
| SirMilkman | Developer | |
| SirMinos | Developer | |
| SirRed | Developer | |
| SirRosticciano | Developer | |
| SirScutoid | Developer | |
| SirSoul | Developer | |
| SirVeyLance | Developer | |
| SirWigglyGames | Developer | |
| Sir_G | Developer | |
| Sir_Obvious | Developer | |
| Sir_Raitan | Developer | |
| Sir_Silver | Developer | |
| Sirhaian | Developer | |
| Siri | Developer | |
| Siridakis | Developer | |
| Sirill | Developer | |
| Sirio23 | Developer | |
| Siris Pendrake | Developer | |
| SiritoFox Studios | Developer | |
| Sirius Entertainment | Developer | |
| Sirius Games | Developer | |
| Sirius Publishing | Publisher | |
| Sirius Software | DeveloperPublisher | |
| SiriusBYT | Developer | |
| Sirlegna | Developer | |
| Sirlin Games | DeveloperPublisher | |
| Sirnic | Developer | |
| Sirnosir | Developer | |
| Sironium | Developer | |
| Sirvo | DeveloperPublisher | |
| Siryakko | Developer | |
| Sisi | Developer | |
| Sistine Disco | Developer | |
| Sisyphean Games | Developer | |
| Sitraxis | Developer | |
| SiunneStudios | Developer | |
| Siuol | Developer | |
| Siv & Quin | Developer | |
| Six Foot | Publisher | |
| Six Pound Sledge Studios | Developer | |
| SixCyn | Developer | |
| SixWays | Developer | |
| Sixteen | Developer | |
| Sixteen Tons Entertainment | Developer | |
| Sixteens | Developer | |
| Sixth Vowel | Developer | |
| SixthMoonGames | Developer | |
| Sixty Forty Games | Developer | |
| SixtyfourStudios | Developer | |
| Siyei Er | Developer | |
| Size Five Games | DeveloperPublisher | |
| Sizko | Developer | |
| SjoerdHekking | Developer | |
| Sjors Houkes | Developer | |
| Sk1tzFr3n1k | Developer | |
| Sk8terboii | Developer | |
| Ska Software | DeveloperPublisher | |
| Ska Studios | DeveloperPublisher | |
| Skadri | Developer | |
| Skale Games | Developer | |
| Skalik Daniel | Developer | |
| Skandivania Games | DeveloperPublisher | |
| Skaparen | Developer | |
| Skarmuse | Developer | |
| Skarn | Developer | |
| Skashi | Developer | |
| Skatanic Studios | Developer | |
| Ske | Developer | |
| Skeep | Developer | |
| Skeffles | Developer | |
| Skelaboi | Developer | |
| SkeleboneJones | Developer | |
| Skeleton Business | Developer | |
| Skeleton Crew | Developer | |
| Skeleton Crew Studio | Developer | |
| Skeleton Crew Studios | DeveloperPublisher | |
| SkeletonKing20 | Developer | |
| SkeletonMilk | Developer | |
| SkeletonTruck | Developer | |
| Skeletonnetworks | Developer | |
| Skeletonware | Developer | |
| Skelpdar | Developer | |
| Skepfyr | Developer | |
| Sketch | Developer | |
| Sketch House Games | Developer | |
| Sketchbook Games | Developer | |
| Sketchy Coyote Interactive | DeveloperPublisher | |
| Sketchy Logic | Developer | |
| Sketchy.academy | Developer | |
| SketchyNonesense | Developer | |
| Skichoow | Developer | |
| Skinner Space | Developer | |
| Skinny Jean Death Studios | Developer | |
| Skip Ltd. | Developer | |
| SkipNot Digidrive | Developer | |
| Skipha | Developer | |