| 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 | |
| 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 | |