ATOMIC GUARDIANS is a fully CO-OP arcade retro shoot 'em up, where one player flies the ship, and the other player mans the shields. Fight your way through a never ending horde of Brutal Bosses, Alien Monsters and Gigantic Asteroids as you rack up a new world-wide high score. Play with up to three friends, and see how long you can last! Features 1-4 Players with Drop In, Drop out Co-op! Simply "Press Start" anytime during gameplay on an additional controller to join the fun!