SuperSystem

From publishers website:

SuperSystem (S2) is a fast-paced, skirmish-scale superhero miniatures battle game designed to simulate comic book clashes between heroes and villains. Playing a game with SuperSystem requires the following: a copy of these rules, painted miniatures, around 20 six-sided dice, copies of the SuperSheets, pencils, and a roughly 4' x 4' playing area. SuperSystem can be played with 2 or more players, but works best with 2 - 4 participants.