| Deadtoast | Developer | |
| Deakcor | Developer | |
| DeamonStarwind | Developer | |
| Dean Carter | Developer | |
| Dean Wolfwood | Developer | |
| DeanForge | Developer | |
| Deandra Fallon Warrick | Developer | |
| Dear Future Production Committee | Developer | |
| Dear Villagers | DeveloperPublisher | |
| Dearsoft | Developer | |
| Deasonfun | Developer | |
| Death 2 Moochie | Developer | |
| Death Orgone | Developer | |
| Death by Broccoli | Developer | |
| DeathByBlueScreen | Developer | |
| DeathDev | Developer | |
| DeathYigit | Developer | |
| Deathmachine117 | Developer | |
| Deathmofumofu | Developer | |
| Debayudh Rarhi | Developer | |
| Deboradp | Developer | |
| Deborah | Developer | |
| Decacentum | Developer | |
| DecadeDecaf | Developer | |
| Decappoolla | Developer | |
| Decay of Fundy | Developer | |
| Deccir | Developer | |
| Deccoyi | Developer | |
| Deceleris | Developer | |
| December | Developer | |
| Decemberborn Interactive | Developer | |
| DeciTM | Developer | |
| Decibella | Developer | |
| Decision Development | DeveloperPublisher | |
| Deck 13 | DeveloperPublisher | |
| Deck Nine | Developer | |
| Deck Nine Games | Developer | |
| Deck13 | Publisher | |
| Deck13 Interactive | DeveloperPublisher | |
| Deck13 Spotlight | Publisher | |
| Deckpoint Studio | Developer | |
| Deco Digital | DeveloperPublisher | |
| Decode Games | Developer | |
| Deconstructeam | Developer | |
| DeconstructedMind | Developer | |
| Decoy Games | DeveloperPublisher | |
| Decoy Software | Developer | |
| Decratos | Developer | |
| Dedicave | Developer | |
| Dedjo0 | Developer | |
| Dedreek | Developer | |
| DedutioN | Developer | |
| DeeCeeWorks | Developer | |
| DeeGrim | Developer | |
| DeeJayLSP | Developer | |
| DeeMainiac | Developer | |
| Deeborm | Developer | |
| Deebrol | Developer | |
| Deeli Network Technology | Developer | |
| Deen Kei | Developer | |
| Deep Digital Design | Developer | |
| Deep End Games | DeveloperPublisher | |
| Deep Fried Entertainment | Developer | |
| Deep Red Games | Developer | |
| Deep River Publishing | Publisher | |
| Deep Shadows | Developer | |
| Deep Silver | DeveloperPublisher | |
| Deep Silver Dambuster | Developer | |
| Deep Silver UK | Publisher | |
| Deep Silver Vienna | Developer | |
| Deep SilverPAL | Publisher | |
| Deep SilverPAL EU | Publisher | |
| Deep Space | Developer | |
| Deep Studio | Developer | |
| Deep Thought Software (Keith A. Goodyer, Denis Hickie) | Developer | |
| Deep Thought Software (Keith A. Goodyer, Denis Hickie, Darren Melbourne) | Developer | |
| Deep Vigil Studio | Developer | |
| Deep Water | Publisher | |
| Deep-Fold | Developer | |
| Deepnight Games | Developer | |
| Deer Farm | Developer | |
| Deerbell | Developer | |
| Deerfox Games | Developer | |
| Deerpyboi | Developer | |
| Deex | Developer | |
| Deezaath | Developer | |
| Default Labs | Developer | |
| Default developer | Developer | |
| Defaultsound | Developer | |
| Defentures | Developer | |
| Defiant Ape Studios | Developer | |
| Defiant Development | DeveloperPublisher | |
| DefiantNarwhal | Developer | |
| DefinitelyNotAShark | Developer | |
| Deflorio | Developer | |
| Defo Mort | Developer | |
| DeftBlue | Developer | |
| Degica | Publisher | |
| Degica Games | Publisher | |
| Degoma | DeveloperPublisher | |