Robot Unicorn Attack's original web iteration was a moderately funny joke that morphed into an amazingly addictive game, and then morphed into a similarly insanity-fueling mobile game.

Building on the success of the original, Adult Swim Games has made Robot Unicorn Attack 2, which just recently made its Android debut and, happily, seems much more stable and playable than the buggy original.

Rather than trying to explain the sheer madness of RUA 2, we'll defer to Adult Swim's promotional trailer.

Basically, there are hoops, monsters, space whales, and giant star crystals, along with a small army of different unicorns, and an achievement system that actually gives players some motivation to play again later.