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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.
Sierra focuses on indie studios and innovative, graphically unique games that include new IP and reimaginings of beloved Sierra classics. Download Today!
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.
Sierra Gamers is the official website of Ken and Roberta Williams, founders of Sierra On-Line. Dedicated to the history and products of Sierra On-Line Inc.
GOG.COM’s selection of Sierra On-Line are classics like King’s Quest series, Leisure Suit Larry series, Police Quest Collection, Phantasmagoria and other titles like Codename: ICEMAN and Conquests of Camelot: The Search for the Grail.
Game Titles. Please Note: Many of these pages contain larger PDF and graphics files. They may take a few minutes to load on slower connections. PDF containing a full list of Sierra games Download. 1980. Hi-Res Adventure #1: Mystery House. Hi-Res Adventure #2: The Wizard & The Princess. Hi-Res Cribbage.
