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.

"Bloodsport" follows Frank Dux, an American martial artist serving in the military, who decides to leave the army to compete in a martial arts tournament in Hong Kong where fights to the death can occur.

A young officer, just out of West Point is sent to Vietnam, where the men don't respect him until he gets wounded and returns to be a wiser soldier and a better commander

An adventurer (Hamilton) decides to go in search of the lost city in the Amazon jungle. A motley crew of other people with reasons of their own decide to join him for the wealth of the lost city. But to their horror they find out ...