| Name | Types | |
|---|---|---|
| IGS | DeveloperPublisher | |
| IGS (JP) | Publisher | |
| IGS Games | DeveloperPublisher | |
| IGS JP | Publisher | |
| IIIIII | Developer | |
| IIopn | Developer | |
| IJK Software | DeveloperPublisher | |
| IKO Games | Developer | |
| IKStudio | Developer | |
| IKTeam | Developer | |
| IK_Knight | Developer | |
| ILCA | Developer | |
| ILIKESCIFI | Developer | |
| ILL TETEKA | Developer | |
| ILOI | Developer | |
| IMAZIC | DeveloperPublisher | |
| IMC | Publisher | |
| IMC Games Co.,Ltd. | DeveloperPublisher | |
| IMJ Entertainment | Developer | |
| IMP | Developer | |
| IMPULSE SLY | Developer | |
| IMWgms | Developer | |
| INCD021 | Developer | |
| INDIECN | Developer | |
| INDIEVIDS | Developer | |
| INF | Developer | |
| INFINITY PATHOLOGY GAMES | Developer | |
| ININ Games | Publisher | |
| INKEYE | Developer | |
| INKIVI | Developer | |
| INOS | DeveloperPublisher | |
| INTERSTELLAR INDUSTRIES | Developer | |
| INTFARM | Developer | |
| INTV | Publisher | |
| INTV Corporation | Publisher | |
| IN|Framez | DeveloperPublisher | |
| IN|Framez Technology | Developer | |
| IO | Developer | |
| IO Design Group | Developer | |
| IO Entertainment | Developer | |
| IO Interactive | DeveloperPublisher | |
| IOMO | Developer | |
| IONorth Games | Developer | |
| IOmarDev | Developer | |
| IOniverse | Developer | |
| IPalos | Developer | |
| IR Gurus | Developer | |
| IRON Games | Developer | |
| ISART DIGITAL | Developer | |
| ISCO | Developer |