Robot Unicorn Attack - Heavy Metal is the second in the Robot Unicorn Attack series of games. Based on the original Robot Unicorn Attack, this follow-up replaces the cutesy theme of the first game with METAL. The game's music is 'Battlefield' by Blind Guardian. Enter a world of darkness, where rainbows are replaced by fire and brimstone, skillfully navigating the platforms that stretch unending through the deepest depths of the underworld. Collect imps as you go, leaping majestically from island to island and dashing through the perilous pentagrams that block your way. You have but three tries. Failure is inevitable. Source: The Publisher Website.