| Igrek Games | Developer | |
| IgrekGames | Developer | |
| Iguana Entertainment | Developer | |
| Iguana Entertainment UK | Developer | |
| Iguana Games | Developer | |
| Iguana West | Developer | |
| IguanaBee | Developer | |
| Iheanacho | Developer | |
| Iiro Lindell | Developer | |
| IkaRisu | Developer | |
| Ikarion Software | DeveloperPublisher | |
| Ikaroon | Developer | |
| IkeGAME | Developer | |
| IkeVoodoo | Developer | |
| Iker Tranchand | Developer | |
| IkerTP | Developer | |
| Ikesoft | DeveloperPublisher | |
| Iki Capitan | Developer | |
| Ikigai Productions Co | Developer | |
| Ikigai_Games | Developer | |
| Iknowcturne | Developer | |
| Iksonik | Developer | |
| IlPrinny | Developer | |
| Ilan Raab | Developer | |
| Ilan1009 | Developer | |
| IlayTsa | Developer | |
| Ildfuglen | Developer | |
| Iletora | Developer | |
| Ilex Games | Developer | |
| Ilias Sokolis GD | Developer | |
| Iliya Kinanev | Developer | |
| IllFonic | DeveloperPublisher | |
| Illarion e.V. | Developer | |
| Illioneus | Developer | |
| Illo | Developer | |
| Illogical | Developer | |
| IllogicalDesigns | Developer | |
| Illogika | DeveloperPublisher | |
| Illuminated Games | Developer | |
| Illumination Games | DeveloperPublisher | |
| Illus Seed | Developer | |
| Illusia | Developer | |
| Illusion | DeveloperPublisher | |
| Illusion Interactive | Developer | |
| Illusion Soft | DeveloperPublisher | |
| Illusion Softworks | Developer | |
| Illusion SoftworksEU | Publisher | |
| Illusions | Developer | |
| Illusions Gaming Company | Developer | |
| IllusiveCenter | Developer | |
| 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 | |