| InterServ International | Developer | |
| InterWeave Entertainment | Developer | |
| Interabang Entertaiment | Publisher | |
| Interactionman | Developer | |
| Interactive Arts | Developer | |
| Interactive Binary Illusions | Developer | |
| Interactive Brains | DeveloperPublisher | |
| Interactive Designs | Developer | |
| Interactive Entertainment | Developer | |
| Interactive Fables | Developer | |
| Interactive Fantasies | Publisher | |
| Interactive Fantastic Fiction | Developer | |
| Interactive Fate | Developer | |
| Interactive Gaming Software | Publisher | |
| Interactive Girls Club | DeveloperPublisher | |
| Interactive IP | Developer | |
| Interactive Imagination | DeveloperPublisher | |
| Interactive Kingdom | DeveloperPublisher | |
| Interactive Literature | Developer | |
| Interactive Magic | DeveloperPublisher | |
| Interactive Stone | DeveloperPublisher | |
| Interactive Strip | Developer | |
| Interactive Studios | Developer | |
| Interactive Studios Ltd. | Developer | |
| Interactive entertainment | Developer | |
| InteractiveMediaConsulting | Publisher | |
| Interactivegg90s | Developer | |
| Interactivision A | DeveloperPublisher | |
| Interavision | Publisher | |
| Interbec | Developer | |
| Interceptor Entertainment | Developer | |
| Interceptor Micros | Publisher | |
| Interceptor Software | Publisher | |
| Interchannel | DeveloperPublisher | |
| InterchannelJP | Publisher | |
| Interdimensional Space Wizards | Developer | |
| Intergalactic Development | Developer | |
| Intergalactic Development Incorporated | DeveloperPublisher | |
| IntergalacticSandwich | Developer | |
| Intergrow | Publisher | |
| Interloper Games | Developer | |
| Intermedia Team | Developer | |
| Internal Engine | Publisher | |
| Internal Matter | Developer | |
| International Computer Entertainment | DeveloperPublisher | |
| International Game System | Publisher | |
| International Games System | DeveloperPublisher | |
| International PC Owners | DeveloperPublisher | |
| International Technology Development Corporation | Developer | |
| Internet Festival | Developer | |