Two Under Domes have been secured and are used for “Entertainment” purposes. Moixxie’s Underdome is used gladiatorial style combats where a team is put against all manner of scum from the prisons and mutant beasts. The surviving team wins cash prizes.
Mars Arena is in a old city ruins that has been walled off to make a large arena. Here several teams of life prisoners battle it out across a booby trap filled ruined cityscape. The winning team (what is left of it) is granted freedom. The Mars Arena also holds the Running Man tournaments in which a prisoner is hunted and has to escape/survive.