| D2C Games |
| D3 Publisher |
| Daedalic Entertainment |
| Danger Close |
| Dark Energy Digital |
| Darkling Room |
| Darkside Game Studios |
| Darkstar |
| Darkworks |
| DarXabre Games |
| Data Becker |
| Data Design Interactive |
| Davilex Games |
| Day 1 Studios |
| Daydream Software |
| Deadline Games |
| Deck 13 |
| Deep Fried Entertainment |
| Deep Red |
| Deep Silver |
| Defiant Development |
| Definitive Studios |
| Deibus Studios |
| Denyusha |
| Destineer Studios |
| Detn8 Games |
| Devolver Digital |
| Digital Anvil |
| Digital Eclipse |
| Digital Extremes |
| Digital Leisure |
| Digital Reality |
| Digital Smash |
| Digital Spray |
| Digital Works Entertainment |
| Digitalo |
| Dimps Corporation |
| Direct Action Games |
| Disney Interactive |
| Disney Online |
| Diversions Entertainment |
| DMA Design |
| Do My Best Games |
| Dontnod Entertainment |
| Double Fine Productions |
| Double Helix |
| DreamCatcher Interactive |
| DreamRift |
| DrinkBox Studios |
| dtp entertainment |
| Dynamighty |
