The game displays a dynamic crosshair, positioned with mouse movement, with which to aim. Move the point of intersection onto an enemy to establish target locks. Locks are indicated by semi-circular lines that close in around the enemy being targeted, and the number of locks established is indicated by small gray triangles above the lock. Locks accrue one-by-one until the maximum number of eight (
per enemy is attained, or until the number of locks required to destroy the enemy have been accumulated. The lock around an enemy turns red when the number of locks required to destroy the enemy have been established.