| Double Helix Games | Developer | |
| Double Helix Studios | Developer | |
| Double R. | Developer | |
| Double Sept | Developer | |
| Double Stallion | Developer | |
| Double Stallion Games | Developer | |
| DoubleCrown | Developer | |
| DoubleDeckerCheese | Developer | |
| DoubleDutch Games | Developer | |
| DoubleGlasses | Developer | |
| DoubleMoose | DeveloperPublisher | |
| DoubleSix | Developer | |
| DoubleTap Games | Developer | |
| DoubleTom | Developer | |
| DoubleVGames | Developer | |
| DoubleZeroOneZero | Developer | |
| Double_Darling_duo_deluxe | Developer | |
| Doublemoose Games | Developer | |
| Doublesix | Developer | |
| Doublesquare | Developer | |
| Doug Anderson | Developer | |
| Doug Barnett | Developer | |
| Doug Beeferman | Developer | |
| Doug Carlston | Developer | |
| Doug Carlston & Chris Jochumson | Developer | |
| Doug Cox | Developer | |
| Doug MacNeill | Developer | |
| Doug Matthews | Developer | |
| Doug Sharp | Developer | |
| Doug Thrower | Developer | |
| Doug Townley | Developer | |
| Doug Valenta | Developer | |
| Dougie mcg | Developer | |
| Douglas Adams | Developer | |
| Douglas Adams & Steve Meretzky | Developer | |
| Douglas Asted | Developer | |
| Douglas E. Smith | Developer | |
| DouglasKim | Developer | |
| Douglasian | Developer | |
| DoujinDev | Developer | |
| Douzane | Developer | |
| Dovahbilly | Developer | |
| Dove06 | Developer | |
| Dovely | Developer | |
| Doveon | Developer | |
| Dovetail Games | DeveloperPublisher | |
| Dovii | Developer | |
| Down to the Wire | Developer | |
| DownUnder | Developer | |
| DownVoteGames | Developer | |