| 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 | |