Ultima IV: Quest of the Avatar is a groundbreaking role-playing game that reshapes the RPG experience by focusing on morality and virtue rather than traditional combat. Set in the transformed world of Britannia, players embark on a quest to become the Avatar, a symbol of ethical living based on the Eight Virtues: Truth, Love, and Courage. The game encourages players to make morally conscious decisions, with actions affecting their character's alignment with these virtues, ultimately guiding them towards the game's objectives.

The game features an improved engine with color graphics and enhanced character interactions, allowing players to engage in conversations by typing topics. Character creation is unique, determined by responses to moral dilemmas. Players can explore Britannia freely, using various transportation methods, while managing the collection of items necessary to access the Stygian Abyss. Ultima IV combines traditional RPG elements with innovative features such as recruiting non-playable characters and engaging in first-person dungeon exploration, solidifying its legacy in the genre.