| ISCO Inc | Developer | |
| ISK games | Developer | |
| ISNI | Developer | |
| ISplit | Developer | |
| IT Territory | Publisher | |
| ITBOMB studios | Developer | |
| ITDA | Developer | |
| ITE Media | DeveloperPublisher | |
| ITL | Developer | |
| ITL Co. | Developer | |
| ITL Co., Ltd. | Developer | |
| ITZ_WAX | Developer | |
| ITZmohammedX151 | Developer | |
| ITkweens | Developer | |
| IUDAV 1st year students | Developer | |
| IUG | Developer | |
| IV | Developer | |
| IVA1 | Developer | |
| IVIA | Developer | |
| IVP Productions | Developer | |
| IYG+REV+TAK | Developer | |
| I_am_Plen | Developer | |
| I_never_finish_anyth | Developer | |
| I_realized | Developer | |
| Ia | Developer | |
| IacomusRex | Developer | |
| Iain Christopher Hayward | Developer | |
| Iain Crockett | Developer | |
| Iain Harrison | Developer | |
| Iain the Indie | Developer | |
| Iam87 | Developer | |
| IamBugzyy | Developer | |
| IamNOTaCAT | Developer | |
| IamWhatonearth Studios | Developer | |
| Iaman | Developer | |
| Iamgineer | Developer | |
| Ian | Developer | |
| Ian Andrew | Developer | |
| Ian Beynon | Developer | |
| Ian Bird | Publisher | |
| Ian Burnette | Developer | |
| Ian Copeland | Developer | |
| Ian Dunlop | Developer | |
| Ian Eborn | Developer | |
| Ian Ellery | Developer | |
| Ian Hamilton | Developer | |
| Ian Heath | Developer | |
| Ian Lilley | Developer | |
| Ian MacLarty | Developer | |
| Ian Mandarini | Developer | |
| Ian Martin | Developer | |
| Ian McArdle | Developer | |
| Ian McEachern | Developer | |
| Ian Morgan | Developer | |
| Ian Morrison | Developer | |
| Ian Obst | Developer | |
| Ian Oliver | Developer | |
| Ian Piumarta | Developer | |
| Ian Porter | Developer | |
| Ian Richards | Developer | |
| Ian Schiffman | Developer | |
| Ian Sheridan | Developer | |
| Ian Smith | Developer | |
| Ian Spadin | Developer | |
| Ian Upton | Developer | |
| Ian Weatherburn | Developer | |
| IanGoGo | Developer | |
| IanGraven | Developer | |
| IanHinck | Developer | |
| IanJeannin | Developer | |
| IanLux | Developer | |
| IanPeter | Developer | |
| Iancu Makes Games Alone | Developer | |
| Ianky | Developer | |
| Iarukalb | Developer | |
| Iber Soft | DeveloperPublisher | |
| Iber Software | Publisher | |
| Ibid Inc. Software | Developer | |
| Ibispi | Developer | |
| Ibn | Developer | |
| Ibrahem Abassi | Developer | |
| Ibrahim | Developer | |
| Ibrahim Jr. | Developer | |
| Ibrahim Kaya | Developer | |
| Ibrahim Khorakiwala | Developer | |
| IbrahimFalih | Developer | |
| Icaro Ferracini | Developer | |
| IcarusIrving | Developer | |
| IcaruzGames | Developer | |
| Ice Beam | Developer | |
| Ice Cool Coders (Chris Pile, Balor Knight, Stephen Corry) | Developer | |
| Ice Flames | Developer | |
| Ice Phoenix Studios. | Developer | |
| Ice Pixel Games | Developer | |
| Ice Queen Studio | Developer | |
| Ice Water Games | DeveloperPublisher | |
| Ice-Pick Lodge | DeveloperPublisher | |
| IceBox246 | Developer | |
| IceDev | Developer | |
| IceKalt | Developer | |
| IceMage144 | Developer | |
| IceMcFall | Developer | |
| IcePeakk | Developer | |
| IceTorch Interactive | DeveloperPublisher | |
| IceVayne Games | Developer | |
| Icealy | Developer | |
| Iceberg Interactive | DeveloperPublisher | |
| IcebergLettuce | Developer | |
| Icecore Studios | Developer | |
| Iced_Lemon | Developer | |
| Icefire149 | Developer | |
| Icefix | Developer | |
| Iceflake Studios | DeveloperPublisher | |
| IcefoxZettai | Developer | |
| Icelord888 | Developer | |
| Icemember | Developer | |
| Icemojo | Developer | |
| Iceybones | Developer | |
| Ichi Soft | Publisher | |
| Ichidown | Developer | |
| Ichigo | Developer | |
| Ichigo Games | Developer | |
| Ichigoichie | Publisher | |
| Ichikawa | DeveloperPublisher | |
| IchikawaJP | Publisher | |
| Ichinose Studios | Developer | |
| Icon Design | Developer | |
| Icon Design (Michael Davies, GOOF, John Brennan) | Developer | |
| Icon Design (Paul Atkinson, Ed Knight) | Developer | |
| Icon Design (Paul Atkinson, John Brennan) | Developer | |
| Icon Design (Paul Murray, Ed Knight, Andrew Morris) | Developer | |
| Icon Design (R Womack, Ed Knight) | Developer | |
| Icon Design (Stuart J. Ruecroft) | Developer | |
| Icon Design (Tom Lanigan, Paul Murray, Jas C Brooke) | Developer | |
| Icon Design Ltd (Ian Hetherington, Ed Knight) | Developer | |
| Icon Design Ltd (Paul Murray, Ed Knight, John Brennan, David Whittaker) | Developer | |
| Icon Design Ltd (Phil Berry, Stuart Ruecroft, David Whittaker) | Developer | |
| Icon Design Ltd. | Developer | |
| Icon Games Entertainment | Developer | |
| Iconoclast209 | Developer | |
| Iconographics | Developer | |
| Icosmophedron | Developer | |
| Icoso | Developer | |
| Icun P | Developer | |
| IcyLava | Developer | |
| IcySenpai | Developer | |
| Icyberd | Developer | |
| Icykid | Developer | |
| Id Software | Developer | |
| Ida.F | Developer | |
| Idan Rooze | Developer | |
| Iddmeister | Developer | |
| Idea Factory | DeveloperPublisher | |
| Idea Factory International | Publisher | |
| Idea FactoryJP | Publisher | |
| Idea Games | Publisher | |
| Idea Software | DeveloperPublisher | |
| Ideabob | Developer | |
| Idealogic | DeveloperPublisher | |
| Ideas From the Deep | Developer | |
| Ideas Pad | Developer | |
| Ideas from the Deep | Developer | |
| Ideaworks3D | Developer | |
| IdenVi Official | Developer | |
| IdenticalBug | Developer | |
| Ides | DeveloperPublisher | |
| Idigicon Limited | DeveloperPublisher | |
| Idle Birch | Developer | |
| Idle Creations | Developer | |
| Ido Adler | Developer | |
| Idol FX | Developer | |
| Idol Minds | Developer | |
| Idont Studio | Developer | |
| Idopox | Developer | |
| Ifeelodd | Developer | |
| IffiDev | Developer | |
| Ifurito | Developer | |
| IgbowGames | Developer | |
| IggyLikesToCode | Developer | |
| Iggymob | DeveloperPublisher | |
| Igloosoft | Developer | |
| Ignacio Abril | Developer | |
| Ignacio Puccini | Developer | |
| Ignatz Höch | Developer | |
| Ignite Studio | Developer | |
| Ignition | DeveloperPublisher | |
| Ignition Entertainment | DeveloperPublisher | |
| Ignition EntertainmentEU | Publisher | |
| Ignition EntertainmentEU,NA | Publisher | |
| Ignition EntertainmentNA | Publisher | |
| Ignition EntertainmentPAL | Publisher | |
| Ignition M | DeveloperPublisher | |
| Ignition Publishing | Publisher | |
| Ignition Tokyo | Developer | |
| Igno | Developer | |
| Igor Dias | Developer | |
| Igor Gafton | DeveloperPublisher | |
| Igor Konyakhin | Developer | |
| Igor Sandman | Developer | |
| Igor' | Developer | |