OmletteSoft, Home Of Omlette - Lord Omlette's personal homepage.

Ominous Development - Developer of Onyx Star.

The Other Guys (TOG) - Game developers located in Härnösand, in the northern part of Sweden. T.O.G. consists of computer enthusiasts with long experience in the software industry.

Oquirrh Productions - Developers of hunting, shooting and conservation games.

O3 Games AB - A Swedish game company currently developing a real-time strategy game called 'The Outforce'.

Outsource Media - Offers computer games voice production in the UK, US. Services include casting, recording, post production, game developer services, and support.

Optical Realities - Developers of games such as Puz.