| 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 | |