Companies Sierra Entertainment American video game companyfounded 1979, dissolved 2008 Parent companyActivisionfounded 1 October 1979SubsidiariesSSynergistic Softwarefounded 1978, dissolved 1999DDynamixfounded 1984, dissolved 2001IImpressions Gamesfounded 1989, dissolved 2004Founded byRoberta Williamsborn 1953Ken Williamsborn 1954Owned byCCUC Internationalfounded 1973CCendantfounded 1996, dissolved 2006Vivendi Gamesfounded 21 February 1996, dissolved 10 July 2008Activision Blizzardfounded 10 July 2008 From Wikipedia and Wikidata (public domain), updated daily.
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