If you enjoyed Adult Swim's tale of Erasure, unicorns, dolphins, and robotic versions thereof, you may be happy to learn that now you can do it all again, only angrier. Robot Unicorn Attack Heavy Metal is the sequel to the original arcade game, Robot Unicorn Attack, in which you pilot a robotic unicorn through a treacherous landscape. Although this time there's less fluffy purple clouds and more red and screaming. Jack Black would approve. Really, isn't that all that matters?
As before, your mighty steed does all the running, and all you have to do is tap [Z] to jump, hit it again to double-jump, and use [X] to perform a dash attack that can break through the stars that appear in your way. You have three lives (or "nightmares"), and one ends when you run into an obstacle, which means instant death. At the end of all three nightmares, your score is combined into a total and, uh... that's... it, really. Run for as long as you can, grabbing the little flying imps that appear for a small bonus, and try not to blow up.
Ultimately, whether you prefer this over its fluffier, cuddlier older sibling comes down to whether you like Erasure or headbanging. Despite an admittedly awesome reskin and, uh, louder soundtrack, it's still basically the same game. Just remember to throw up the horns with whatever hand you aren't using to play; it's always important to pay tribute to the Gods of Rock.