Trine is a fantasy action game where the player can create and use physics-based objects to beat hazardous puzzles and threatening enemies. Set in a world of great castles and strange machinery, three heroes are bound to a mysterious device called the Trine in a quest to save the kingdom from evil.

The gameplay is based on fully interactive physics - each character's different ability helps the player battle an army of un-dead and defeat hazardous contraptions. The player can at any time freely choose whoever is best suited for the upcoming challenge or puzzle: The Wizard is able to summon objects to help solve puzzles and create new ways to overcome obstacles, the Thief uses her agility and dead-on accuracy to swiftly surprise the monsters, and the Warrior unleashes mayhem and physical destruction wherever he goes.