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- Acronymble -Board Games
- Ad Astra Games - Wargames
- Adiken - Card games, miniature games
- Ætheric Dreams - Role-playing games
- Agents of Gaming - Wargames
- Agglo - Magnetic travel games
- Alderac Entertainment Group - Collector card games, role-playing games
- Alea - (Part of Ravensburger)
- Alea Publishing Group - Role-playing games
- Alpine Games - Card and board games
- Alternative Armies - Wargames
- Amarillo Design Bureau Inc. - Space war games and miniatures
- Amateur Press Association - Games magazine
- Amigo Spiele - Board games
- APBA - Sports, board, and computer games
- Apex Publications - Role-playing games
- Arc Dream Publishing - Role-playing games
- Archaia Studios Press - Role-playing games
- Art Meets Matter - Board games and game design concepts
- Asmodée Éditions - Board games (formerly called Siroz)
- Atlas Games - Collectible card games, card games, and role-playing games
- Australian Design Group - Wargames
- Avalanche Press - Historical boardgames and historical d20 modules
- Avalon Hill - (part of Wizards of the Coast) Board games
Read more about this topic: List Of Game Manufacturers