Robot Unicorn Attack: Heavy Metal sets Facebook on fire

Robot Unicorn Attack Heavy Metal on Facebook
Robot Unicorn Attack Heavy Metal on Facebook

Robot Unicorn Attack now comes in two flavors on Facebook, and by flavors, I don't mean unicorn SPAM. But since the original's September debut, Adult Swim Games has also launched a Heavy Metal and a Christmas version (iPhone only so far) on its site. But today, finally, Robot Unicorn Attack: Heavy Metal has been unleashed upon Facebook.