Lock's Quest is a real time strategy game that combines three elements: Build, Battle, and Explore. Combat begins with a stylus-driven Build Mode where the player places walls, turrets, and traps to strategically defend objectives. After this, the enemies begin their onslaught in Battle Mode, where the player controls Lock directly with the stylus in Diablo-esque action combat. Finally, as the player completes battles, RPG-like story sequences drive the action along, encouraging the player to explore and discover the dark truth behind Antonia and the Archineer Guild.