| Deniz Ege Tunçay | Developer | |
| Denki | Developer | |
| Denki Onkyo | Publisher | |
| Dennaton Games | Developer | |
| Dennis Cunningham | Developer | |
| Dennis Dellemann | Developer | |
| Dennis Turner | Developer | |
| Dennis Verschuur | Developer | |
| DennisByDEN. | Developer | |
| DennisMac | Developer | |
| DennisTM | Developer | |
| Dennnis K | Developer | |
| Denno | Developer | |
| Dennou Club | DeveloperPublisher | |
| DennyPahlke | Developer | |
| Denomrs | Developer | |
| Denpa | Developer | |
| DensetsuNoGomez | Developer | |
| Denside Studios | Developer | |
| Dented Designs | Developer | |
| Dentelin | Developer | |
| Denton Designs | Developer | |
| Denton Designs (Antony McCabe, Ally Noble, David Whittaker) | Developer | |
| Denton Designs (John Gibson, Karen Davies) | Developer | |
| Denton Designs (John Gibson, Simon Butler) | Developer | |
| Denton Designs (John Heap, Fred Gray) | Developer | |
| Denton Designs (Steve Lamb, Jas C Brooke) | Developer | |
| Denton Designs (Steven Cain, Simon Butler) | Developer | |
| Dentons | Developer | |
| Dentsu | Developer | |
| Denvzla Estudio | DeveloperPublisher | |
| Denysoft | DeveloperPublisher | |
| Denyu-Sha | DeveloperPublisher | |
| Denyusha Co. | Developer | |
| Denzel | Developer | |
| Denzil Buchner | Developer | |
| DeoVolente.Games | Developer | |
| Deprecat | Developer | |
| Deprecated Games | Developer | |
| Depresso Espresso | Developer | |
| DeqafStudio | Developer | |
| Der Kevin | Developer | |
| DerEL_Dev | Developer | |
| DerJulien | Developer | |
| DerKIAS | Developer | |
| DerKuchen | Developer | |
| Derabo | Developer | |
| DerbanDev | Developer | |
| Derek Andes | Developer | |
| Derek Austin | Developer | |
| Derek Brewster | Developer | |
| Derek Caelin | Developer | |
| Derek Gieraltowski | Developer | |
| Derek Smart | Developer | |
| Derek Wilson | Developer | |
| Derek Yu | Developer | |
| Derivas | Developer | |
| Dermot | Developer | |
| DerpyDino35 | Developer | |
| Derpylag40 | Developer | |
| Derrick Austin | Developer | |
| Derrick P Rowson | Developer | |
| Dervish934 | Developer | |
| Des O'Toole | Developer | |
| Desarrollador | Developer | |
| Descendant Studios | Developer | |
| Desces | Developer | |
| Desenha | Developer | |
| Desert Fox | Developer | |
| Desert Hare Studios | Developer | |
| Desert Owl Games | DeveloperPublisher | |
| Desert Productions | Developer | |
| Desertor1993 | Developer | |
| Desichan | Developer | |
| Design Design | DeveloperPublisher | |
| Design Factory | Developer | |
| Design Imps | Developer | |
| DesignStar Consultants | Developer | |
| DesignStar Consultants, Inc. | Developer | |
| DesignTalks | Developer | |
| DesignWare | DeveloperPublisher | |
| DesignYoukai | Developer | |
| Designer Software | DeveloperPublisher | |
| Designer Software (Jimmy Huey) | Developer | |
| Designlabs. | Developer | |
| Designware | Publisher | |
| Designware Consultants | Developer | |
| Desire | DeveloperPublisher | |
| Desktoy | Developer | |
| Desmó | Developer | |
| DespairStudio | Developer | |
| Despance | Developer | |
| DespawnGames | Developer | |
| Desperados Studio | Developer | |
| DesseilleRemy | Developer | |
| Dessert Lynx | Developer | |
| Destan Entertainment | Developer | |
| Destin715 | Developer | |
| Destination Design | Developer | |
| Destination Games | Developer | |