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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 focuses on indie studios and innovative, graphically unique games that include new IP and reimaginings of beloved Sierra classics. Download Today!
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.
GOG.COM’s selection of Sierra On-Line are classics like Quest for Glory series, Leisure Suit Larry series, Police Quest Collection, and other titles like Ulysses and the Golden Fleece, The Colonel’s Bequest, and The Incredible Machine franchise.
Sierra Entertainment, Inc. [1] (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. Sierra is...
AVAILABLE NOW!!!! This is the official site of Ken & Roberta Williams. Dedicated to the history and products of Sierra On-Line Inc.
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.
