| Toxapez | Developer | |
| Toxic Games | DeveloperPublisher | |
| Toxic Sasquatch | Developer | |
| Toxic Squad | Developer | |
| ToxicPink | Developer | |
| Toxicator | Developer | |
| Toxijuice | Developer | |
| ToxinWasTaken | Developer | |
| Toy Box | Developer | |
| ToyBox | Developer | |
| ToyPops | DeveloperPublisher | |
| Toybox | Developer | |
| Toybox Games | Developer | |
| Toybox Games Studio | Developer | |
| Toydea | DeveloperPublisher | |
| Toyful Games | DeveloperPublisher | |
| Toylogic | Developer | |
| Toys For Bob | Developer | |
| Toys for Bob | Developer | |
| Toyuro | DeveloperPublisher | |
| Tozai Games | DeveloperPublisher | |
| Tozaku | Developer | |
| Tozzo4316 | Developer | |
| Tpot | Developer | |
| Tr3a | Developer | |
| TrAyZeN | Developer | |
| Trabulance | DeveloperPublisher | |
| TrackMaster: Free For All Motorsport | Developer | |
| Tracy Montgomery | Developer | |
| Trade | Developer | |
| Tradewest | Publisher | |
| Tradewest NA | Publisher | |
| Tradewest NA/EU | Publisher | |
| Traffic Software | DeveloperPublisher | |
| Traggey | Developer | |
| Tragnarion Studios | DeveloperPublisher | |
| Tragos Games | Developer | |
| TrainYard Interactive | Developer | |
| Trainwreck Studios | Developer | |
| Tran | Developer | |
| Trancepticon | Developer | |
| Tranji Studios | Developer | |
| Tranklizer | Developer | |
| Transformer Production Company Inc. | Developer | |
| Transgaming Technologies | Developer | |
| Transhuman Design | Developer | |
| Transmission Games | Developer | |
| Transoft | Publisher | |
| Transolar Games | Developer | |
| Transposed | Developer | |
| TranziT471 | Developer | |
| Trapdoor | Publisher | |
| TrapdoorGames | Developer | |
| Trapped Nerve Games | Publisher | |
| Traptics | Developer | |
| Trash Panda | Developer | |
| TrashCanPete | Developer | |
| TrashCastle | Developer | |
| TrashEntity | Developer | |
| TrashGameStore | Developer | |
| Trashcan | Developer | |
| Trashgames | Developer | |
| Trashy Rascal Studios | Developer | |
| TrashyQueen | Developer | |
| Trasjfire Games | Developer | |
| Tratser | Developer | |
| TraumWerke | Developer | |
| Trauma Studios | Developer | |
| Traumendes_Madchen | Developer | |
| Traveller's Tales | Developer | |
| Travellers (John de Salis, Tony Huggard, Shaun McClure) | Developer | |
| Travellers Rest | Developer | |
| Travis Baldree | Developer | |
| Travis D. Hill | Developer | |
| Travis Fort | Developer | |
| Travis Root | Developer | |
| TravisChen | Developer | |
| Traxmaster Software | DeveloperPublisher | |
| Trazzy | Developer | |
| Treasure | DeveloperPublisher | |
| Treasure Co. Ltd | Developer | |
| Treasuresofgrinda | Developer | |
| Trecision | DeveloperPublisher | |
| Trecision S.p.A. | Developer | |
| Treco | DeveloperPublisher | |
| TrecoJP | Publisher | |
| TrecoNA | Publisher | |
| Tredain | Developer | |
| Tree Castle | Developer | |
| Tree Interactive | DeveloperPublisher | |
| TreeFall Studios | DeveloperPublisher | |
| TreeFortress Games | Developer | |
| Treecki | Developer | |
| Treeg0n (Treeangle) | Developer | |
| Treehouse Dreams | Developer | |
| Treehouse Studios | Developer | |
| TreeofLife | Developer | |
| Trei ☕ | Developer | |
| Trembjo | Developer | |
| Tremoid Games | Developer | |
| Tremor Entertainment | Developer | |
| Trench Squad | Developer | |
| Trend Verlag | Publisher | |
| Trendy Entertainment | DeveloperPublisher | |
| Trent Garlipp | Developer | |
| Trent-Sama | Developer | |
| TrevSaysHi | Developer | |
| Treva Entertainment | DeveloperPublisher | |
| Trevor Figgins | Developer | |
| Trevor H. | Developer | |
| Trevor Hall | Developer | |
| Trevor Lever | Developer | |
| Trevor Perks | Developer | |
| TrevorIsGood | Developer | |
| Trevor_J_Eshleman | Developer | |
| TrexandDrago Development | Developer | |
| Trey1232 | Developer | |
| Treyarch | DeveloperPublisher | |
| Treyarch Invention | Developer | |
| Treyarch Invention, LLC | Developer | |
| Tri Synergy | DeveloperPublisher | |
| Tri-Ace | Developer | |
| Tri-Crescendo | Developer | |
| Tri-Heart Interactive | DeveloperPublisher | |
| Tri-Synergy | Publisher | |
| TriBrain | Developer | |
| TriSoft | DeveloperPublisher | |
| TriSynergy | Publisher | |
| TriTorus | Developer | |
| TriVoxel | Developer | |
| Triad | Developer | |
| Trialforge Studio | Developer | |
| Triangle | Developer | |
| Triangle Games | Developer | |
| Triangle Service | DeveloperPublisher | |
| Triangle Studios | DeveloperPublisher | |
| TriangulumSpiral | Developer | |
| Trianull | Developer | |
| Trias Vitae | Developer | |
| Triatic | Developer | |
| Tribal games | Developer | |
| Triband | DeveloperPublisher | |
| Tribe Games | Developer | |
| Tribeca Interactive | Developer | |
| Tribetoy | DeveloperPublisher | |
| Tribute Games | DeveloperPublisher | |
| TriceratopsX | Developer | |
| Tricgered | Developer | |
| Trickstar Games | Developer | |
| TricksterBit | Developer | |