The player, as an "archineer" (architect/engineer) named Lock, must build walls, turrets, and magical defenses against an army of mechanized invaders, all in the space of two minutes. When that time is up, combat begins, and Lock must battle the enemies directly (using various touch-screen-based activities to determine the success of each attack) and gather more resources in order to keep the invading army at bay.
The time limit makes Lock Nation a sort of arcade RTS, and one that people who shy away from traditional strategy games may find interesting -- especially since it has online multiplayer
