Founded in 1979, Sierra On-Line grew into one of the largest computer game companies in the 1980s and 1990s, and they produced some of the most popular and influential games of the era. These include the first graphical computer adventure, Mystery House, the first third-person graphical adventure game, King's Quest (plus its many sequels). Other popular titles include The Black Cauldron, Mixed-Up Mother Goose, Leisure Suit Larry, Gabriel Knight, and Phantasmagoria. Sierra is also famous for pioneering the use of animation, video, and humor in computer games.
This is a hand-painted still from the 1992 re-make of the Sierra video game Police Quest.