| Huntv | Developer | |
| HurlCatGames | Developer | |
| HusbandoGoddess | Developer | |
| Hush Games | Developer | |
| HuskyDusky | Developer | |
| Hustla Masi | Developer | |
| Hut 90 | Developer | |
| Hutchingson Computer Publishing | Publisher | |
| Hutchinson Computer Publishing | Publisher | |
| HuvaaKoodia | Developer | |
| Huw2k8 | Developer | |
| HuwW | Developer | |
| Huyosumi | Developer | |
| Hwagner9 | Developer | |
| Hyacinth Nil | Developer | |
| Hybriona Labs | Developer | |
| Hyde | Developer | |
| Hydravision | Developer | |
| Hydravision Entertainment | Developer | |
| HydroGene | Developer | |
| Hydrodinamic Studios | Developer | |
| Hydrohen24 | Developer | |
| Hydropic | Developer | |
| HyenaDev | Developer | |
| Hyeogieh | Developer | |
| Hyniora Nagase | Developer | |
| Hynt Studios | Developer | |
| Hyo-Kin Soft | Developer | |
| Hyogo Onimushi | Developer | |
| Hyohnoo | Developer | |
| Hyojj Xipitug | Developer | |
| Hyourin7372 | Developer | |
| Hypa Hypa Designs (Nigel Edwards) | Developer | |
| HypeTrain Digital | Publisher | |
| Hyper | Developer | |
| Hyper Awesome | DeveloperPublisher | |
| Hyper Awesome Entertainment | DeveloperPublisher | |
| Hyper DevBox Japan | Publisher | |
| Hyper Drive Gaming Studio | Developer | |
| Hyper Fox Studios | Developer | |
| Hyper Games | Developer | |
| Hyper Luminal Games | Developer | |
| Hyper-Devbox | Developer | |
| Hyper-Devbox Japan | DeveloperPublisher | |
| HyperBabyDuck | Developer | |
| HyperBole Studios | Developer | |
| HyperDevbox Japan | Developer | |
| HyperDrop Studios | Developer | |
| HyperGames | Developer | |
| HyperGamesDev | Developer | |
| HyperTech Gaming | Developer | |
| HyperThreeStudio | Developer | |
| HyperWolf | Developer | |
| Hyperbolic | Developer | |
| Hyperbolic Magnetism | Developer | |
| Hyperdrive | Developer | |
| Hyperfocus Interactive | Developer | |
| Hypergrip | Developer | |
| Hyperial Software Developments | Developer | |
| Hyperion Studios | Developer | |
| Hyperion Thunder | Developer | |
| Hyperkinetic Studios | Developer | |
| Hyperlink Your Heart | Developer | |
| Hyperly | Developer | |
| Hypersect | DeveloperPublisher | |
| Hyperspace Cowgirls | Developer | |
| Hyperstrange | DeveloperPublisher | |
| Hyperviolet Engineering | Developer | |
| Hyperware | DeveloperPublisher | |
| Hypnagogia Games | Developer | |
| HypnoCube | Developer | |
| HypnoSpeaker | Developer | |
| Hypnohustler | Developer | |
| Hypnorama | Developer | |
| Hypnos Entertainment | Developer | |
| Hypnos Games | Developer | |
| Hypnotic Owl | Developer | |
| Hypnotix | Developer | |
| Hypothermia | DeveloperPublisher | |
| Hypothermic | Developer | |
| HyproX | Developer | |
| Hyptonix | Developer | |
| Hyroglyphik Games | DeveloperPublisher | |
| Hyve | Developer | |
| H³Oof | Developer | |
| Hörberg Productions | DeveloperPublisher | |
| I N C . | Developer | |
| I Choose Paradise | Developer | |
| I Nullafacenti | Developer | |
| I Shot A Fawn | Developer | |
| I am Shen | Developer | |
| I trevelyan I | Developer | |
| I'MAX | DeveloperPublisher | |
| I'Max | DeveloperPublisher | |
| I'Max JP | Publisher | |
| I*Motion (North America) | Publisher | |
| I-Dont-Like-I-Obsess | Developer | |
| I-DreamSoft | Publisher | |
| I-FRIQIYA | Developer | |
| I-Imagine | Developer | |
| I-Imagine Interactive | Publisher | |
| I-Space Interactive | Developer | |
| I-cell | DeveloperPublisher | |
| I. Okuyama | Developer | |
| I.E.Game studio | Developer | |
| I.J.E. | Developer | |
| I.Magic | DeveloperPublisher | |
| I.Motion Inc. | Publisher | |
| I.O.S. Team | DeveloperPublisher | |
| I.S.C. | Developer | |
| I.S.C. Co., Ltd. | DeveloperPublisher | |
| I.T.L | Developer | |
| I.T.L Inc. | Developer | |
| I.V.O Games | DeveloperPublisher | |
| I.W.A. | Developer | |
| I3 | Developer | |
| I3uckwheat | Developer | |
| IAA | Developer | |
| IAH Games | Publisher | |
| IAmDirt | Developer | |
| IBA | Developer | |
| IBM | DeveloperPublisher | |
| IBOL | Developer | |
| IBS | DeveloperPublisher | |
| IC Contemporary | Developer | |
| IC Rainbow | Developer | |
| ICE | DeveloperPublisher | |
| ICE Software | Developer | |
| ICE Software (Alan Grier, Chris Scudds) | Developer | |
| ICE Software (Ian Morrison, Alan Laird, Alan Grier, Dave Lowe) | Developer | |
| ICE Software (Ian Morrison, Douglas Little, Alan Grier, Chris Scudds) | Developer | |
| ICE9jpn | Developer | |
| ICMationDev | Developer | |
| ICOM Simulations | DeveloperPublisher | |
| ICON Games | Publisher | |
| ICONICWARE | Developer | |
| ICS | DeveloperPublisher | |
| IChoMo | Developer | |
| ICreateMyGames | Developer | |
| ID Software | Developer | |
| IDC | DeveloperPublisher | |
| IDDK | Developer | |
| IDHAS Studios | Developer | |
| IDSA | Publisher | |
| IDSI | Developer | |
| IE Institute | DeveloperPublisher | |
| IEP_Esy | Developer | |
| IF | Developer | |
| IFCATS | Developer | |
| IGG | Publisher | |
| IGS | DeveloperPublisher | |
| IGS (JP) | Publisher | |
| IGS Games | DeveloperPublisher | |
| IGS JP | Publisher | |
| IIIIII | Developer | |
| IIopn | Developer | |
| IJK Software | DeveloperPublisher | |
| IKO Games | Developer | |
| IKStudio | Developer | |
| IKTeam | Developer | |
| IK_Knight | Developer | |
| ILCA | Developer | |
| ILIKESCIFI | Developer | |
| ILL TETEKA | Developer | |
| ILOI | Developer | |
| IMAZIC | DeveloperPublisher | |
| IMC | Publisher | |
| IMC Games Co.,Ltd. | DeveloperPublisher | |
| IMJ Entertainment | Developer | |
| IMP | Developer | |
| IMPULSE SLY | Developer | |
| IMWgms | Developer | |
| INCD021 | Developer | |
| INDIECN | Developer | |
| INDIEVIDS | Developer | |
| INF | Developer | |
| INFINITY PATHOLOGY GAMES | Developer | |
| ININ Games | Publisher | |
| INKEYE | Developer | |
| INKIVI | Developer | |
| INOS | DeveloperPublisher | |
| INTERSTELLAR INDUSTRIES | Developer | |
| INTFARM | Developer | |
| INTV | Publisher | |
| INTV Corporation | Publisher | |
| IN|Framez | DeveloperPublisher | |
| IN|Framez Technology | Developer | |
| IO | Developer | |
| IO Design Group | Developer | |
| IO Entertainment | Developer | |
| IO Interactive | DeveloperPublisher | |
| IOMO | Developer | |
| IONorth Games | Developer | |
| IOmarDev | Developer | |
| IOniverse | Developer | |
| IPalos | Developer | |
| IR Gurus | Developer | |
| IRON Games | Developer | |
| ISART DIGITAL | Developer | |
| ISCO | Developer | |