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- Darcsyde Productions - Role-playing games
- Dark Omen Games - Role-playing games
- Days of Wonder - Board games
- Day Dreamer Interactive - Role-playing games
- db Spiele - Board games
- Decipher, Inc. - Trading card games, role-playing games
- Dead Ant Games - Card games
- Death's Edge Games - Role-playing games
- Decision Games - Board games
- Deep 7 - Role-playing games
- Délires - Role-playing games (closed in 1998)
- DemonBlade Games - Miniatures games
- Descartes Editeur - Board games
- Design Depot, DYNASTY League Baseball - Baseball Board and Online games
- Destination Games - Dice games
- Destruction Games - Role-playing games
- DG Associates - Card and collector card games
- Dice and Games Ltd - Dice
- D'Ice Inc. - Dice
- Different Worlds - Role-playing games and accessories
- Digest Group Publications - Role-playing games
- Digital Media Exchange, Inc. (dme) - Role-playing games
- Dimension Six - Role-playing accessories
- Dinnergames Design - Murder mystery games
- Distant Seas Publishing - Board games
- Do Tell Enterprises - Board games
- Dog-eared Designs - Role-playing games
- Dog Soul Publishing - Role-playing games
- Doris&Frank - Card games
- Doster Company - Miniatures games
- Dragon - Gaming magazine
- Dragon Shields - Collector card game accessories
- Dragon Tree Press - Role-playing accessories
- Dragonlords - Role-playing accessories
- Dream Factory - VCR games
- Dream Green - Educational games and game accessories
- Dream Pod 9 - Miniatures and role-playing games
- Dream Quest Games - Board games
- Dreamborn - Role-playing games
- Driftwood Publishing - Role-playing games
- Dust Bunny Games - Card games
- Dwarfstar Games - Wargames
- Dwarven Forge - Miniatures and accessories
- Dynasty Presentations - Role-playing games and accessories
Read more about this topic: List Of Game Manufacturers