Underworld is the remake of an old arcade game, of the 80's. The plot and the rules are unchanged: you are the Underworlder, a miner who has to clear out from monsters the world under his feet. You go deep under the ground, digging and shooting at monsters like Puff Dragons (dragons spitting fire) and Dyclops (strange mutant creatures which can transform in flying eyes). You shoot air bullets which, once reached for the target, put air into it. The more you shoot, the more air will be pumped into the monster, until it'll blow up. Monsters apart, you can be killed also by solar radiations, so you can't stay for long time at the surface. Sometimes a Halloween's pumpkin appears: catch it, is a special reward. Sound and Graphics are pretty, but not exceptional. You won't be hypnotized by them.