Odyssey: The Compleat Apventure is a turn-based role-playing game. It consists of multiple parts and places the player in the role of the leader of an army who sets out to defeat an evil wizard. The game contains elements of Dungeons & Dragons and combines elements of two earlier games written by the same author: Dungeon Campaign and Wilderness Campaign.
The game features three major sections. Except for the endgame section, the gameplay is presented in a top-down map with minimalistic animation and sound effects.