The last human has been slain by evil killer robots. Play the one remaining humanoid battle droid. The mission is to avenge the human race, and destroy the four bots of the Apocalypse - Leiunitas, Bellum, Lues, and Letum, while destroying enemies and avoiding chasers, turrets, spawners, minelayers, bombs, and bullets.

Ultratron provides 70+ different robots to destroy, 40+ levels of Crimsonland-like shooter action, bonus stages, and online highscore table.