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…Los Angeles Times . ^ Gamespot Staff (April 26, 2000). "Sierra On-line Reorg" . gamespot.com . ^ Dunkin, Alan (April 28, 2000). "Sierra Plans for the Future" . gamespot.com . ^ Jebens, Harley (April 28, 2000). "Sierra…
…Activision Blizzard In April 2009, Valve sued Activision Blizzard , which acquired Sierra Entertainment after a merger with its parent company, Vivendi Universal Games . Activision had allegedly refused to honor the Valve v…