Ballz

Ballz is a two-player 3D action fighting video game for the Sega Mega Drive/Genesis, the Super NES (SNES) and the 3DO. It was developed by PF Magic and published by Accolade in 1994. The 3DO version was released as a director's cut in 1995. Ballz offered three difficulty levels over a total of 21 matches. Its distinguishing quality was that each of the characters were composed completely of spheres, granting a pseudo-3D look.
Although the game was not a tremendous success, PF Magic reused its graphics technology in a successful line of virtual pet titles, Petz, Dogz, Catz and Oddballz.