Videogames.com overview:
Metal Maniax was a 3D smash-em-up game that took place inside one of eight metal-walled arenas. You selected from six cars and drove around the arena trying to smash your opponents into pulp, knocking their panels off. There were also six different weapons that could be used, including a cannon and a powerful magnet. Panels would fly off and land on the ground, where they could be driven over and picked up for more health. The problem was it ran at a very low frame rate and most players didn't understand the complexity.
WHAT HAPPENED?
Derryl DePriest of Atari Games said, "A beautiful game that should have
made it but the technology wasn't in place at the time. We actually have
a unit that works here, I am told..."