Odyssey: The Compleat Apventure

Odyssey: The Compleat Apventure is a video game written by Robert Clardy and released by Synergistic Software in 1980. It was created for the Apple II platform and is considered one of the first microcomputer-based role-playing video games. The title was intentionally misspelled; Apventure is a reference to the Apple computer while "Compleat" is simply an Archaic spelling of the word "complete" meant to match the feel and setting of the game.

A forerunner of Akalabeth and Ultima, Odyssey was a multi-part adventure game that placed the player in the role of the leader of an army who sets out to vanquish the Caliph, an evil wizard. Elements of Dungeons & Dragons can be found within the game, which combines elements of two earlier games written by Clardy: Dungeon Campaign and Wilderness Campaign.