Following the success of 2005's Mercury, this sequel brings you more features, new game modes and different, cartoon-like graphics for newer and tougher challenges. Like its predecessor, Mercury Meltdown invites you to race small blobs of mercury around mazes constructed in laboratory settings. That's not so easy to do when the blobs are prone to split up and become smaller blobs of liquid. One false move, and you're a stain on the floor.