| Stormfront Studios | Developer | |
| Stormind | Developer | |
| Stormind Games | Developer | |
| StormingTech | Developer | |
| Storminounet | Developer | |
| Stormmer | Developer | |
| Stormseeker Games | DeveloperPublisher | |
| Stormtrooper | Developer | |
| StormtrooperJon | Developer | |
| Stormyman | Developer | |
| Story Fort | DeveloperPublisher | |
| StoryTale Studios | Developer | |
| StoryTime | Developer | |
| Storybird | DeveloperPublisher | |
| Storybird Games | Developer | |
| Storybird Studio | Developer | |
| Storysinger Presents | Developer | |
| Storysmash | Developer | |
| Storytold Comics | Developer | |
| Stout Games | Developer | |
| Stovetop | Developer | |
| Stovetop Studios | Developer | |
| Stoyan | Developer | |
| Straditarion | Developer | |
| Straight Right | Developer | |
| StraightUpGruntled | Developer | |
| Stralor | Developer | |
| Stranded Island | Developer | |
| Strandline Games | Developer | |
| Stranga Games | Developer | |
| Strange Creatures Studio | Developer | |
| Strange Fire | Developer | |
| Strange Flavour | Developer | |
| Strange Hoop | Developer | |
| Strange Loop Games | Developer | |
| Strange Nebula | Developer | |
| Strange Spaces | Developer | |
| StrangeGames | Developer | |
| StrangePolarBear | Developer | |
| StrangeSquad | Developer | |
| Strangelite | Developer | |
| Strangely Named | DeveloperPublisher | |
| Stranger | Developer | |
| Stranger Games | DeveloperPublisher | |
| Strangest.io | Developer | |
| Strani Anelli | Developer | |
| Stranker | Developer | |
| Strass Productions | Developer | |
| Strata | Publisher | |
| Strata (publisher) | Publisher | |
| Strata Group | Publisher | |
| Strata, Incredible Technologies | Publisher | |
| Strategic Simulations | DeveloperPublisher | |
| Strategic Simulations Group | Publisher | |
| Strategic Simulations Inc. | Publisher | |
| Strategic Simulations, Inc | DeveloperPublisher | |
| Strategic Simulations, Inc. | DeveloperPublisher | |
| Strategic Studies Group | DeveloperPublisher | |
| Strategic Visions | Developer | |
| Strategy 3 Tactics | Developer | |
| Strategy First | DeveloperPublisher | |
| Strato | Developer | |
| Stratobox | Developer | |
| Stratos Kakalis | Developer | |
| Stratos Kanavitsas | Developer | |
| Stratos Software | Publisher | |
| Straw Vision | Developer | |
| Strawbeary Games | Developer | |
| Strawberry Dagger Studio | Developer | |
| StrawberryIcicles | Developer | |
| StrawberryOctii | Developer | |
| Strawdog Studios | Developer | |
| Stray Bullet Games | Developer | |
| Stray Fawn | Publisher | |
| Stray Fawn Studio | DeveloperPublisher | |
| Stray Games | Developer | |
| Straywolf Games | Developer | |
| Streaking Hostages | Developer | |
| Streamline Games | DeveloperPublisher | |
| Streamline Studios | Developer | |
| Street guests | Developer | |
| StreetMackerel | Developer | |
| Streetwise | Publisher | |
| Streetwise Software | Publisher | |
| Streko-Graphics | Developer | |
| Strelka Games | DeveloperPublisher | |
| Strelok | Developer | |
| StretchMasterP | Developer | |
| Streum On Studio | Developer | |
| Strictly Limited Games | Publisher | |
| Strid | Developer | |
| StrideWide | Developer | |
| StriderToll | Developer | |
| Strig | Developer | |
| StrigopStudios | Developer | |
| Strike | Developer | |
| Striker | DeveloperPublisher | |
| StrikerSVX | Developer | |
| StrikerSoft | Developer | |
| StripedSwipers | Developer | |