| Dei-bit | Developer | |
| Deibner Entertainment | Developer | |
| Deibus Studios | Developer | |
| Deimos Games | Developer | |
| DejaBug Games | Developer | |
| DejaDrew | Developer | |
| Dejan13 | Developer | |
| Dejima | Developer | |
| Dejobaan Games | Developer | |
| Dejvo | Developer | |
| DekaWolf | Developer | |
| DekeDev | Developer | |
| Dekori | Developer | |
| Del | Developer | |
| DelSarafgames | Developer | |
| DelSoft | Developer | |
| Del_Duio | Developer | |
| Delacannon | Developer | |
| Delacroz | Developer | |
| Delazus | Developer | |
| Delca | Developer | |
| Delezie | Developer | |
| Delfin | Developer | |
| Deli Interactive | Developer | |
| DeliciousGames | Developer | |
| DelightWorks | Publisher | |
| Delightfullymad | Developer | |
| Delightworks | Publisher | |
| Delimma Studio | Developer | |
| Delirium Games | Developer | |
| Delirium Studios | DeveloperPublisher | |
| DeliroGames | Developer | |
| DeliverGames | Developer | |
| Delos Software (Andrew Severn, Martin Severn, Colin Swinbourne, Mike Brown) | Developer | |
| Delos Software (Mark Haden, David Wright, Martin Severn) | Developer | |
| Delphic | Developer | |
| Delphine Software | DeveloperPublisher | |
| Delphine Software International | DeveloperPublisher | |
| Delrel | Developer | |
| Delta 4 | Publisher | |
| Delta 4 (Fergus McNeill, Judith Child) | Developer | |
| Delta 4 Interactive | Developer | |
| Delta 4 Software | Developer | |
| Delta Arts | Developer | |
| Delta Rayquaza | Developer | |
| Delta Soft | Publisher | |
| Delta Software | Publisher | |
| Delta Tao Software | DeveloperPublisher | |
| Deltanullnull | Developer | |
| Deltaplane | Developer | |
| Delthor Games | Developer | |
| Delton T. Horn | Developer | |
| Deltros | Developer | |
| Deluge Games | Developer | |
| DelumStudios | Developer | |
| Delunado | Developer | |
| Deluvi | Developer | |
| Delvatron | Developer | |
| Delve Interactive | Developer | |
| Dema studios | Developer | |
| Demeno | Developer | |
| Dementia | Developer | |
| Dementia (Gary Priest, Kevin Bulmer, Jonathan Dunn) | Developer | |
| Dementia Productions | Developer | |
| Demerara Games | Developer | |
| Demi | Developer | |
| Demian | Developer | |
| Demiero | Developer | |
| DemigodDave | Developer | |
| Demigration | Developer | |
| Demimonde | Developer | |
| Demiurge Studios | Developer | |
| Demizo | Developer | |
| Demjanjuk06 | Developer | |
| DemmyDev | Developer | |
| DemonClaus | Developer | |
| DemonGyro | Developer | |
| DemonsKiddy | Developer | |
| Dempa | DeveloperPublisher | |
| Dempa JP | Publisher | |
| Dempa Micomsoft | DeveloperPublisher | |
| Dempa Micomsoft Co., LTD | Publisher | |
| Dempa Shimbunsha | Publisher | |
| Dems | Developer | |
| Den Normale | Developer | |
| Den'Z | Publisher | |
| DenGra | Developer | |
| DenTheMan | Developer | |
| Denari | Developer | |
| Denda Games | Publisher | |
| Denebola Interactive | Developer | |
| Denedox | Developer | |
| Dengar | Developer | |
| Denhonator | Developer | |
| Deni Romance | Developer | |
| Denis | Developer | |
| Denis Cormier | Developer | |
| Denis Kazantsev | Developer | |
| Denis_Grenier | Developer | |
| Denixmis | Developer | |
| 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 | |