Sierra On-Line releases its first computer game, Hi-Res Adventure #1: Mystery House, for the Apple II computer. Pairing simple text descriptions with even simpler line art, the game marks a turning point in computer adventure games, and sets Sierra on a course to become one of the best-selling game software houses of the ’80s. 
Sierra On-Line releases the computer game Mouskattack. Designed by John Harris, this is one of several titles Sierra will publish to get a Pac-Man-style game on the home computer market before Atari can release an official port. It is available for the Atari home computers.
Sierra releases the computer role playing game game Ultima II: Revenge Of The Enchantress for the Apple II home computer. Written by Richard “Lord British” Garriott, this is the second volume of the best-selling Ultima series of RPGs, and the first to introduce space travel and science fiction elements into the games’ sword-and-sorcery fantasy setting.