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Sierra Entertainment
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American video game company
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Wikipedia

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. It is known for its graphical adventure game series...

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Video game developer
Video game publisher
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Giant Bomb Wikidata