The calm before the swarm. Unfortunately, an ill-natured evil brain has penetrated deep inside your home world and you are the last line of defense for your once peaceful planet. Use your planet's sole cannon position to blast the menacing cerebrum and its protective swarm into stardust. Single-player, 2-player cooperative, 2-player tag team, three customizable cannon choices, five challenge rounds, four different difficulty levels, and one nasty brain. Scores of protective swarm. A few mechanized protective swarm. An occasional U.F.O., loads of lightning zaps, laser blasts, missile launches, power-up bonus drops, explosions, chaos, and complete mayhem. Version 2.1.1 includes 2-Player Cooperative play - Challenge Round 1 bug fix.