Lock's Quest

Lock's Quest
Developer(s)	5th Cell Digital Continue (remaster)
Publisher(s)	THQ THQ Nordic (remaster)
Director(s)	Jeremiah Slaczka
Designer(s)	Jeremiah Slaczka
Composer(s)	David J. Franco
Platform(s)	Nintendo DS Microsoft Windows macOS Linux PlayStation 4 Xbox One
Release	Nintendo DS NA: September 9, 2008 AU: September 25, 2008 EU: September 26, 2008 JP: February 19, 2009 Microsoft Windows, PlayStation 4, Xbox One WW: May 30, 2017 Apple iOS, Android WW: September 5, 2019
Genre(s)	Real-time strategy, tower defense
Mode(s)	Single-player, multiplayer

Lock's Quest is a real-time strategy tower defense video game developed by 5th Cell and published by THQ. It is 5th Cell's second Nintendo DS game. Players control Lock, a young man forced to help defend the kingdom of Antonia from an invasion of clockwork soldiers. The gameplay revolves around constructing defences such as walls and turrets on isometric battle maps, then controlling Lock to fight alongside and maintain his defences.

The game was positively received upon its original release in 2008, with critics particularly praising the plot, gameplay and graphics. Criticism was also made of the controls, both in building defences and controlling Lock on the battlefield. In 2017, a remaster of Lock's Quest was released for PC, PlayStation 4 and Xbox One, and in 2019 was ported to iOS and Android mobile phones.