Mondu's Fight Palace (C64, 5 1/4" Disk) Activision - 1989 USA, Canada Release

Description from the packaging.

Welcome to the Fight Palace: Two creatures in a pit, strange moves, magical weapons, wild betting, and your host, Mondu the Fat.

"Humanoids, they come apart so easily in the fight pits. Especially when you pull on their arms." - Mondu The Fat, Champion of the Pit.

Pick your lifeform.
Control and combat a variety of aliens, each with over 18 different moves and special animations.

Load up on bio weapons.
Dr. Kadaver sells the latest: Multimax Steroids pump you up, Grasfur Slug Eggs keep your victim down.

Roast the host.
The fat man goads you onward or laughs at your corpse. Victory brings you a shot at revenge.

Put up your shut up.
Gamble your earnings and get inside info at Wagemaker's. His mouth is big but so are the stakes.

Punish or perish.
Meet harsh reality in the fight pits. The crowds are ugly, your foes uglier. An assortment of weapons help you even the odds.

Created by Brian A. Rice and Mark D. Waterman.