Sierra Entertainment
Video game company
Sierra Entertainment, Inc. was an American video game developer and publisher founded in 1979 by Ken and Roberta Williams. The company is known for pioneering the graphic adventure game genre, including the first such game, Mystery House. Wikipedia
Parent organizations: Activision, Vivendi Games, Activision Blizzard, and more
Founders: Roberta Lynn Williams and Ken Williams
Founded: 1979, Simi Valley, CA
Formerly: On-Line Systems; (1979–1982); Sierra On-Line, Inc. (1982–2002)
Headquarters: Los Angeles, U.S
Video games
