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Sierra Entertainment, Inc. (formerly On-Line Systems and Sierra On-Line, 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.
Sierra Entertainment is a software label which publishes games from indie developers. Founded in 1979 by Ken and Roberta Williams, it developed and published a large variety of video games, including a number of best-selling games and series, for various platforms between 1980 and 2008.
TitlePlatform (s)Release DateDeveloper (s)May 5, 198019801980Yosemite Software1980Sierra Games is a publisher of indie games and reimagined classics from Sierra Entertainment. Explore new IP and old favorites like King's Quest, Geometry Wars, Shiftlings, and Velocity 2X.
Sierra Entertainment, Inc. (formerly Sierra On-Line) was an American video game developer and publisher founded in 1979 as On-Line Systems by Ken and Roberta Williams. Based in Los Angeles, California, the company was last owned by Activision, a subsidiary of Activision Blizzard.
A fan site for Sierra On-Line, Inc., the creators of classic point and click adventure games. Find out about their new game Colossal Cave 3D, their books, and their history.
Jun 30, 2022 · Learn about the origins, achievements and challenges of Sierra On-Line, the company that created the adventure game genre. Discover the stories behind King's Quest, Leisure Suit Larry, Gabriel Knight and more.
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Sierra Entertainment, Inc. (formerly On-Line Systems and Sierra On-Line, 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.
