Encyclopédie
Entreprises
Studios, éditeurs et autres sociétés liées aux œuvres.
Oasis Games
Oberon Games
Oberon Media
Object Software
Obsidian
Obsidian Entertainment
Ocean
Ocean Media
Ocean of America
Ocean Software
Ocean Software Ltd.
Oceanus
Océlo
Ocelot Society
Oddworld Inhabitants
Offworld Industries
Oliver Clarke
Omega Force
Ominous Development
Omni Creative Group
Omnimedium Studios
One More Level
one2tribe
Onesong Partners
OnGames
Oni Gaming
Oniric Games
OnNet
OnSkull Games
OpenTTD Team
Opus Studio
Orange_Juice
Origamihero
Origin Systems
Original Fire Games
Origo
