From Sega Retro
|Founded: 1979 (as On-Line Systems)|
|Merged into: Activision (2008)|
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Sierra On-Line (known as Sierra Entertainment since 2002 and formed as On-Line Systems in 1979) was one of the premier adventure games developers in the 80's and 90's. They owned fellow game developer Dynamix, and additionally operated an internal development team named PyroTechnix.
- Bouncers (1994)
- Leisure Suit Larry in the Land of the Lounge Lizards (unreleased)
- Mixed-Up Mother Goose (unreleased)
- Police Quest III: The Kindred (unreleased)
- Space Quest IV: Roger Wilco and the Time Rippers (unreleased)
- Stellar 7 (unreleased)