| Illwinter Game Design | Developer | |
| Illymani Designs | Developer | |
| Ilusis Interactive Graphics | DeveloperPublisher | |
| Ilya873 | Developer | |
| Im Fake | Developer | |
| ImDaBanana | Developer | |
| ImDivingDeep | Developer | |
| ImFluffyForLife | Developer | |
| ImMatureTony | Developer | |
| ImPulse Games | Developer | |
| ImTheNorth | Developer | |
| Ima_g0d | Developer | |
| Imadio | Publisher | |
| ImagEngine | Developer | |
| Image & Form | DeveloperPublisher | |
| Image Campus | Developer | |
| Image Epoch | Developer | |
| Image Impressions | Developer | |
| Image Labo | Developer | |
| Image Software | Publisher | |
| Image Space Incorporated | DeveloperPublisher | |
| Image Works | DeveloperPublisher | |
| Image WorksPAL | Publisher | |
| ImageBuilder Software | Developer | |
| Imageepoch | Developer | |
| Images Ltd | Developer | |
| Images Ltd (Damien Stones, James Sharp, Neil Crossley) | Developer | |
| Images Ltd (Dave Semmens, Jim Kinlough, Neil Crossley) | Developer | |
| Images Ltd (Tony Mack, Daren White, Damian Stones, Jason G. Lihou, David Whittaker, Alan Tomkins) | Developer | |
| Images Software | Developer | |
| Imagesoft | Developer | |
| Imagetic Design | Developer | |
| Imageworks | Developer | |
| Imagexcel | Developer | |
| ImagiNovel | Developer | |
| ImagiSoft | DeveloperPublisher | |
| ImagiSoft, Inc. | DeveloperPublisher | |
| Imagic | DeveloperPublisher | |
| ImaginEngine | Developer | |
| Imaginarium | Developer | |
| Imaginarium of Glass & Weeds | Developer | |
| Imaginary Thomas | Developer | |
| Imagination Science | Developer | |
| ImaginationOverflow | Developer | |
| Imaginative Illusions | DeveloperPublisher | |
| Imagine | Publisher | |
| Imagine Fantasia | Developer | |
| Imagine Filmfestival | Developer | |
| Imagine Galaxy | Developer | |
| Imagine Software | DeveloperPublisher | |