| Simon Gigant | Developer | |
| Simon Golding | Developer | |
| Simon Herfert | Developer | |
| Simon Hobbs | Developer | |
| Simon Hutchinson | Developer | |
| Simon JC Davies | Developer | |
| Simon K. Overy | Developer | |
| Simon Kaley | Developer | |
| Simon Micro-Soft (Clive Brooker) | Developer | |
| Simon Munnery | Developer | |
| Simon Price | Developer | |
| Simon Street | Developer | |
| Simon Stålhandske | Developer | |
| Simon Valdemar Weber | Developer | |
| Simon W Hessel | Developer | |
| Simon Wadsworth | Developer | |
| Simon Welland | Developer | |
| Simon White | Developer | |
| SimonCurtis | Developer | |
| SimonHoffiz | Developer | |
| SimonJacobsen | Developer | |
| SimonLoko | Developer | |
| SimonOlivecrona | Developer | |
| SimonTS | Developer | |
| SimonTranArt | Developer | |
| Simona Maiorano | Developer | |
| Simondtd | Developer | |
| Simone Cicchetti | Developer | |
| Simone Guggiari | Developer | |
| Simonelmono | Developer | |
| Simonotos | Developer | |
| Simpathey | Developer | |
| Simple Bit Games | Developer | |
| Simple Ghost | Developer | |
| SimpleTeam | Developer | |
| SimplefullLab | Developer | |
| Simpleton | Developer | |
| Simplewd Games | Developer | |
| SimplexCode | Developer | |
| Simplify | Developer | |
| Simply-Sardines | Developer | |
| Simplyunstopable | Developer | |
| Sims | DeveloperPublisher | |
| Sims Limited | Developer | |
| Simsalabim Software | DeveloperPublisher | |
| Simsquared Ltd. | Publisher | |
| Simtex | Developer | |
| Simulated Environment Systems | Developer | |
| Simulations Canada | DeveloperPublisher | |
| Simulmondo | DeveloperPublisher | |