This is a challenging, old-school, retro, side-scrolling shooter. The player must defend the base against 28 waves of alien attackers. There are also 10 bonus twin-stick shooter levels, where the player controls a security robot defending the base from enemies tunneling in from below.

This is a challenging, old-school, retro, side-scrolling shooter. The player must defend the base against 28 waves of alien attackers. There are also 10 bonus twin-stick shooter levels, where the player controls a security robot defending the base from enemies tunneling in from below.