Game Description & Manual: The game starts with four Apu units on the dock. Sentinels will attack from breech in the dock's dome. When an Apu pilot's life gauge reaches zero, That Apu will be lost. Guide the cross hairs with the mouse in order to target sentinels. Press the spacebar or mouse button to fire at the sentinels. When a wave of sentinels is destroyed, a new wave will launch and one reinforcement Apu pilot will be given if any Apus Have been lost.