| Swadje | Developer | |
| SwagbobDev | Developer | |
| Swagonite | Developer | |
| SwallowtailedTrinket | Developer | |
| Swampa | Developer | |
| SwankyBox | Developer | |
| Swansonsart | Developer | |
| Swapnil Nishad | Developer | |
| Swat | DeveloperPublisher | |
| Swati Mallya | Developer | |
| Swatt Game | Developer | |
| Swearsoft | Developer | |
| Sweaters | Developer | |
| Sweaty Chair Studio | Developer | |
| Sweaty Tryhard | Developer | |
| SwedenEntertainment | Developer | |
| Swedish Yankspankers | Developer | |
| SwedishFeetballs | Developer | |
| SweeneyXx | Developer | |
| Sweet Arsenic | Developer | |
| Sweet Basil | DeveloperPublisher | |
| Sweet Cyanide | Developer | |
| Sweet Dreams Studio | Developer | |
| Sweet One | Developer | |
| Sweet Onion | Developer | |
| Sweet--Bun | Developer | |
| SweetAce | Developer | |
| SweetChiel | Developer | |
| SweetFreak! | Developer | |
| SweetHeart Squad | Developer | |
| SweetMint | Developer | |
| SweetMouseGames | Developer | |
| SweetPotato | Developer | |
| SweetProductions | Developer | |
| SweetVodka420 | Developer | |
| Sweeto | Developer | |
| Sweets | Publisher | |
| Sweorkie (Helena HB) | Developer | |
| Swetha & Nivetha Kannan | Developer | |
| Swetha Kannan | Developer | |
| Swift Illusion | Developer | |
| SwiftChack | Developer | |
| Swiftingly | Developer | |
| Swing Entertainment | Publisher | |
| Swing Swing Submarine | Developer | |
| Swing! Deutschland | Publisher | |
| Swing! DeutschlandEU | Publisher | |
| Swing! Entertainment | Publisher | |
| Swing! Entertainment AG DE | Publisher | |
| Swing! Entertainment AG EU | Publisher | |
| Swing! Entertainment Media AG DE | Publisher | |
| Swing! Entertainment Media AG EU | Publisher | |
| Swing! EntertainmentEU | Publisher | |
| Swingin' Ape Studios | Developer | |
| Swishless | Developer | |
| SwishyD | Developer | |
| Swofl | Developer | |
| Sword Garden Studios | Developer | |
| Sword Twin Studios | DeveloperPublisher | |
| Swordfish Studios | Developer | |
| Swotty | Developer | |
| Swyft Productions | Developer | |
| Sy | Developer | |
| SyRiNe | Developer | |
| Syanic | Developer | |
| Sybnes | Developer | |
| Sybrial Games | Developer | |
| Sydney Development | DeveloperPublisher | |
| Sydney Development Corp | Developer | |
| Sydney Development Corp. | Developer | |
| Sydney Houk | Developer | |
| Sydney Misuse | Developer | |
| Sydney Myers | Developer | |
| Syed Aman | Developer | |
| Syed Hasnad Jami | Developer | |
| Syfy Kids | Publisher | |
| Sygran | Publisher | |
| Sylaren | Developer | |
| Sylfare | Developer | |
| Syllius | Developer | |
| Sylphelle | Developer | |
| Sylrael | Developer | |
| Sylum Entertainment | Developer | |
| Sylum Entertainment, Ltd. | Developer | |
| Sylvan | Developer | |
| Sylverstone Khandr | Developer | |
| Symbio Planning | Publisher | |
| Symbio Systems | Developer | |
| Symptomatic Productions | Developer | |
| Symtus | DeveloperPublisher | |
| Syn Sophia | Developer | |
| Synapse Software | DeveloperPublisher | |
| Synapse Software Corporation | Developer | |
| Synapsed | Developer | |
| SynapsiaTeam | Developer | |
| Synchro-ni-City | Publisher | |
| SyndaKai | Developer | |
| Syndein Systems | Developer | |
| Syndicate Atomic | DeveloperPublisher | |
| Syndrome developments | Developer | |
| Synergistic | Developer | |
| Synergistic Software | DeveloperPublisher | |
| Synergistic Software, Inc. | Developer | |
| Synergistic Solar | Publisher | |
| Synergy | Publisher | |
| Synergy (Andrew Severn, Peter Austin, Sonic Graffiti, Tau Zero) | Developer | |
| Synergy (Charles Goodwin) | Developer | |
| Synergy Inc. | DeveloperPublisher | |
| Synergy Interactive | Publisher | |
| Synergy Interactive Crop. | Publisher | |
| Synergy Studios | Developer | |
| Synergy's Forge | Developer | |
| Synergy, Inc. | DeveloperPublisher | |
| Synergy-moe | Developer | |
| Synetic | DeveloperPublisher | |
| Synfoniz | Developer | |
| Syngelsa | Developer | |
| Synokoria | Developer | |
| Synset Games | Developer | |
| SynthOveride | Developer | |
| SyntheOtaku | Developer | |
| Syntheon | Developer | |
| Synthetic Dimensions | Developer | |
| Syoudre | Developer | |
| Sypher | Developer | |
| Syphisprod | Developer | |
| Syphonx | Developer | |
| SyrStudios | Developer | |
| Syringa Vulgaris | Developer | |
| Syriph | Developer | |
| Syrox Developments | DeveloperPublisher | |
| Syrrann | Developer | |
| Syrup Pirates | Developer | |
| Syrus Turner | Developer | |
| Syscom | DeveloperPublisher | |
| Syscom Entertainment | Developer | |
| Syscom EntertainmentJP | Publisher | |
| Syscom JP | Publisher | |
| SyscomJP | Publisher | |
| Sysoft | Developer | |
| System 3 | DeveloperPublisher | |
| System 3 (EU) | Publisher | |
| System 3 Software | DeveloperPublisher | |
| System 3EU | Publisher | |
| System 3PAL | Publisher | |
| System 4 | Publisher | |
| System 4 Software | Publisher | |
| System Applied Technology | Developer | |
| System Create | DeveloperPublisher | |
| System Era Softworks | DeveloperPublisher | |