| Subtle Boom | DeveloperPublisher | |
| Subtle Style | DeveloperPublisher | |
| Subtle Tea Games | Developer | |
| Suburb Games | Developer | |
| Suburb_Boone | Developer | |
| Suburban Studios | Developer | |
| Subvert Games | Developer | |
| Subway Software | Developer | |
| Subway Software (Steven Robson, David Whittaker) | Developer | |
| Succes | Publisher | |
| Success | DeveloperPublisher | |
| Success Corp. | DeveloperPublisher | |
| Success Corporation | DeveloperPublisher | |
| Success CorporationJP | Publisher | |
| Success JP | Publisher | |
| SuccessJP | Publisher | |
| SuccubiinHats | Developer | |
| Such_Nick | Developer | |
| Sucholudek | Developer | |
| Sucker Punch Productions | Developer | |
| SuckerFreeGames | Developer | |
| Sudden Event Studios | Developer | |
| Sudesh | Developer | |
| Suellen Hatakeyama (Suu) | Developer | |
| Sugar & Rockets | Developer | |
| Sugar & Rockets Inc. | Developer | |
| Sugar & Spice | Developer | |
| Sugar Beans | Developer | |
| Sugar Hyped | Developer | |
| Sugar Slip | Developer | |
| Sugar Star Games | Developer | |
| Sugar and Rockets | Developer | |
| SugarSores | Developer | |
| Sugary Spire | Developer | |
| Sugeeya | Developer | |
| Sugeiya Ltd. | Developer | |
| Sugeno | DeveloperPublisher | |
| Sugiru | Developer | |
| Suhail Habib | Developer | |
| SuicidePotatoes | Developer | |
| SuicideToro | Developer | |
| Suinotna | Developer | |
| Suits & Sandals | Developer | |
| Sujal | Developer | |
| Sukafu Team | Developer | |
| Sukeban Games | Developer | |
| Sukito Studios | Developer | |
| Sukiyomi | Developer | |
| SukkoyF | Developer | |
| Sukritact | Developer | |
| SulfurGames | Developer | |
| Sullivan Bluth Interactive Media | Developer | |
| Sullivan Bluth Interactive Media, Inc. | Developer | |
| Sully | Developer | |
| SullyZack | Developer | |
| Sumac | Developer | |
| Sumao | Developer | |
| Sumaris | Developer | |
| Sumbeard | Developer | |
| Summer Books Philosophy | Developer | |
| Summer Rose Studios | Developer | |
| Summer Story Game | Developer | |
| SummerOrigins | Developer | |
| SummerTimeAlice | Developer | |
| Summit Software | DeveloperPublisher | |
| SummitGames | Developer | |
| SummitSoft Entertainment | Publisher | |
| Summitsoft Entertainment | DeveloperPublisher | |
| Summitsphere | Developer | |
| Sumo Digital | DeveloperPublisher | |
| SumoStudio | Developer | |
| Sumyjkl | Developer | |
| Sun | Developer | |
| Sun A Electronics | Publisher | |
| Sun Amusement | Publisher | |
| Sun Electronics | DeveloperPublisher | |
| Sun L | Developer | |
| Sun Labyrinth | Developer | |
| Sun Thai | Developer | |
| Sun-Project | Developer | |
| Sun-Tec | Developer | |
| SunA | Publisher | |
| SunA Electronics | Publisher | |
| SunMeltPD | Developer | |
| SunSoft | DeveloperPublisher | |
| SunStar Publishing | Publisher | |
| SunVulpine | Developer | |
| Sunamico | Developer | |
| Sunborn Network | Developer | |
| Sunbreak Games | DeveloperPublisher | |
| Sunburst Communications | Publisher | |
| Sundae Month | Developer | |
| Sunderpoint | Developer | |
| Sundial Interactive | Developer | |
| Sundial Shark | Developer | |
| Sundro | Developer | |
| SuneX Games | Developer | |
| Sunfire | Developer | |
| Sunflowers | Publisher | |
| Sunflowers Interactive | DeveloperPublisher | |