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Commander Keen 6: Aliens Ate My Baby Sitter

Sierra Entertainment

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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 is best known today for its multiple lines of seminal graphic adventure games started in the 1980s, some of which proved influential in the history of video games. The Sierra label has been absorbed by its parent company. Some franchises which were published by Sierra will be published by Activision.

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Developed games
Screenshot	Title	Category	File type(s)	Year
	Donald Duck's Playground Violence: No DOSBox: Supported Rating:	Miscellaneous	Full version	1986
	Leisure Suit Larry in the Land of the Lounge Lizards Violence: No DOSBox: Supported Rating:	Adventure	Playable demo	1987
Published games
Screenshot	Title	Category	File type(s)	Year
	Battle Bugs Violence: No DOSBox: Supported Rating:	Strategy	Playable demo	1994
	The Black Cauldron Violence: No DOSBox: Supported Rating:	Adventure	Full version	1987
	Detroit Violence: No DOSBox: Supported Rating:	Simulation/sport	Playable demo	1993
	Donald Duck's Playground Violence: No DOSBox: Supported Rating:	Miscellaneous	Full version	1986
	Gobliiins Violence: No DOSBox: Supported Rating:	Adventure	Playable demo	1992
	Gobliins 2: The Prince Buffoon Violence: No DOSBox: Supported Rating:	Adventure	Playable demo	1992
	Goblins Quest 3 Violence: No DOSBox: Supported Rating:	Adventure	Playable demo	1993
	The Incredible Machine Violence: No DOSBox: Supported Rating:	Puzzle	Playable demo	1993
	IndyCar Racing II Violence: No DOSBox: Supported Rating:	Simulation/sport	Playable demo	1996
	Leisure Suit Larry in the Land of the Lounge Lizards Violence: No DOSBox: Supported Rating:	Adventure	Playable demo	1987
	Mickey's Space Adventure Violence: No DOSBox: Supported Rating:	Adventure	Full version	1986
	Red Baron Violence: No DOSBox: Supported Rating:	Simulation/sport		1990
	Troll's Tale Violence: No DOSBox: Unknown Rating:	Adventure	Full version	1984
	Winnie the Pooh in the Hundred Acre Wood Violence: No DOSBox: Supported Rating:	Adventure	Full version	1985

"I guess I always had a sense that Underworld was unlike anything anyone had ever seen before - and cooler!"
Warren Spector, creator of Ultima Underworld