The world of Mer is under threat from the Dark Water, which is slowly taking over. King Primus' last words urge his son Prince Ren to find the lost Treasures of Rule to save their kingdom. Ren sets out on a quest to gather allies and brave the challenges ahead.
You control either Ren, Ioz, or Tula as they navigate through levels. Each character can jump, climb, attack, and throw enemies. Your goal is to find keys to unlock doors and interact with non-playable characters who provide hints and assistance. Along the way, you'll collect useful items like throwing weapons, food for health, potions for temporary invincibility, money for certain NPCs, and melons that feed Niddler, returning you to the map screen.