| 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 | |