Oldorf's Revenge is a single-player adventure role-playing game set in a fantasy universe where players explore, battle monsters, and seek treasure to reach a minimum of 300 points to complete the game. In this game, players choose from seven different classes—Gladiator, Cleric, Strongman, Wizard, Elf, Thief, and Magician—and must switch classes strategically during their journey, with each switch costing hit points and limited to five times. It stands out with its class-switching mechanic that influences gameplay, requiring players to balance their abilities and manage health points carefully while navigating through various challenges and encounters.