Founded in 1979 by Ken Williams and Roberta Williams as On-Line Systems, Sierra Online is an American video-game developer and publisher. On-Line Systems became Sierra On-Line in 1980, and moved its headquarters from Los Angeles, California, USA to the Sierra foothill community of Oakhurst, California. The company is presently owned by Activision, a subsidiary of Activision Blizzard.
|E-mail:||Sierra contact page|
7100 W. Center Road
Omaha, NE 68106
|Stock:||ATVI (Activision Blizzard, Inc.)|
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- Aces of the Deep, Europe, and Pacific
- Caesar 3
- Diablo Hell Fire
- Gabriel Knight 3
- Gobliiins, Goblins 2, and Goblins 3
- Half-Life and Half-Life Opposing Force
- Kings Quest 1, 2, 3, 4, 5, 6, and 7
- Kings Quest Mask of Eternity
- Lords of Magic
- Nascar Racing 4
- Police Quest 1, 2, 3, 4, 5
- Police Quest SWAT 2 and SWAT 3
- Tribes and Tribes 2
August 7, 2014 - The Sierra website comes back online.
2008 - Activision announces Sierra is closed and up for sale.
October 2007 - Releases Timeshift.
September 2007 - Releases World in Conflict.
2005 - Sierra Entertainment integrates other companies including High Moon Studios, Massive Entertainment, Radical Entertainment, and Swordfish Studios into its division.
February 19, 2002 - Sierra changes its name to Sierra Entertainment.
March 19, 2001 - Tribes 2 goes gold.
June 2000 - Sierra becomes part of Vivendi Universal.
1988 - Sierra Entertainment's Kings Quest IV becomes first game to support AdLib.
1979 - Sierra is founded.