Companies starting with D
- D-Pad Studio
- D'Avekki Studios
- D3 Publisher
- d3t
- Daedalic Entertainment
- Dambuster Studios
- Dancing Dragon Games
- Dang!
- DANGEN Entertainment
- Daniel Blezek
- Daniel Mullins Games
- Dark Horse Comics
- Dark Math Games
- DarkStone Digital
- Daum
- David OReilly
- Day 1 Studios
- Daybreak Game Company
- Days of Wonder
- Dbrand
- DC Entertainment
- Dead Idle Games
- Dead Mage
- Deadpan Games
- Dear Villagers
- Deck Nine Games
- Deck13 Interactive
- Deconstructeam
- Deep Field Games
- Deep Shadows
- Deep Silver
- Deep Silver FISHLABS
- Deep Silver Volition
- Defiant Development
- Defrost Games
- Dejobaan Games
- Deli Interactive
- Dell Inc
- Demiurge Studios
- Denki
- Dennaton Games
- Descendent Studios
- Destructive Creations
- Devcats
- Devolver Digital
- DICE
- Die Gute Fabrik
- Digerati
- Digipen Institute of Technology
- Digital Anvil
- Digital Bros
- Digital Confectioners
- Digital Eclipse
- Digital Extremes
- Digital Illusions
- Digital Kingdom
- Digital Reef Games
- Digital Sun
- Digital Tchotchkes
- Digixart
- Dim Bulb Games
- Dimfrost Studio
- Dimps
- Dingaling
- Dino Rocket
- Dinosaur Polo Club
- Dire Wolf Digital
- Discord
- Discord Games
- Discount Realms
- Disney Interactive
- Disney Interactive Studios
- DitD Team
- DJ2 Entertainment
- Dlala Studios
- Dodge Roll Games
- Domesticated Ant Games
- Donkey Crew
- DONTNOD Entertainment
- Door 407
- DORFteam
- Dot Blood
- DotEmu
- Double Damage Games
- Double Eleven
- Double Fine Productions
- Double Helix Games
- Dovetail Games
- Dragami Games
- Drago Entertainment
- Dragonis Games
- Dramatic Labs
- DreadXP
- Dream Powered Games
- Dream Sloth Games
- DreamCatcher Interactive
- Dreamlit Inc.
- Dreams Uncorporated
- DreamStorm Studios
- Dreamworks
- DrinkBox Studios
- Drop Bear Bytes
- Ducky
- Dynamic Pixels