Outlaw of Gor(1988)
An Earthman returns to the planet Gor, and fights against tyranny.
Gor /ˈɡɔr/ is the parallel universe Counter-Earth setting for an extended series of novels by John Norman that combine philosophy, erotica, and science fiction. Two films have been made (often considered generic grade-B sci-fi flicks only very loosely based on Norman's books), Gor and Outlaw of Gor (also known as Outlaw); the latter appeared on Mystery Science Theater 3000.
An Earthman returns to the planet Gor, and fights against tyranny.
American professor Tarl Cabot is transported via a magical ring to planet Gor, where he must help an oppressed country overthrow its evil king and his barbarian henchmen.