A mysterious baby is left on the front lines of a mighty battle. The commander for one side adopts the baby and raises it as his own, naming the child Regret. When a demon slays the adoptive father, Regret sets out on a quest to determine why his father died, and also to learn who he himself is.
Zenonia is an action role-playing game in which the player assumes the character of Regret during his quest for truth. The player first selects from one of three character classes: the paladin, warrior, or assassin. Regret then explores the world, traveling about the land, destroying monsters with his sword, and talking to anyone in his path. People often have mini-quests for Regret to run in return for assistance in advancing the story of the game. Further, the game gives Regret choices to make at certain junctures which can alter the story as well as his good/evil alignment.