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Sierra, (Sierra On-Line, Sierra Entertainment Inc.)
was an American video-game developer and publisher founded in 1979 as On-Line Systems by Ken and Roberta Williams, most known for their influential adventure games for the home- and personal computer market, King's Quest and Leisure Suit Larry by Al Lowe. In 1996 sold to CUC International, Sierra was merged and later owned by Vivendi Games, until in 2008 the Sierra trademark was absorbed into Activision Blizzard and closed down later that year ^[1].

Chess Programs

External Links

Page	Date Edited
Attila Kovács	Jan 7, 2016
David Grenewetzki	Apr 19, 2014
David Kittinger	Dec 27, 2017
Disney's Aladdin Chess Adventures	May 15, 2014
Kempelen	Mar 24, 2016
Majestic Chess	Jan 20, 2018
Organizations	Jul 19, 2017
Power Chess	Feb 6, 2015
Sierra	May 3, 2013
WChess	Jan 7, 2016
WMCCC 1986	Jan 7, 2016

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