The scenario is a good way of settling disputes between gangs or bitter enmities could be satisfied. I imagined two fighters being put in an enclosed dome to fight to the death, the survivor being the winner. The two fighters could use stealth to hunt each other before closing for the kill, or just charge headlong at each other, weapons blazing. Of course, they ought not know that their opponents are there, and Just be exploring an area, but they're gonna find out pretty quick!