| 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 | |