The game uses a top-down, mission-based structure. Each stage typically alternates between preparation and assault, letting players place walls, traps, turrets, and support structures before enemies arrive. During combat, Lock can move around the battlefield, repair damaged defenses, and use special actions to hold the line. Progress depends on efficient fort placement, path control, and surviving repeated waves under pressure.

Lock

The young protagonist who constructs defenses and fights on the front lines.

Lord Agony

The main villain leading the invading clockwork forces.

Build layered defenses instead of relying on a single wall line. Place high-damage structures at chokepoints and corners, and keep repair materials available for critical breaches. Learn enemy movement patterns early so you can reserve stronger defenses for the waves that matter most.

Tips and tricks

Use early waves to establish a durable defensive layout.

Tips and tricks

Keep Lock near safe repair routes so he can respond quickly to breaches.

Tips and tricks

Stack slowdowns and damage together for better wave control.

User Reviews

A clever blend of construction and defense that feels distinct on DS.

User Reviews

The pacing rewards careful planning and smart fort placement.

User Reviews

The presentation and mechanical invasion theme make it memorable.