It was a game type my buddies and I used in paintball, basically it's Team Slayer, but when you get near someone you say "surrender or die" if they chose to surrender, they were automatically on the other team.
If they chose "die" then they cannot move from a spot, and a teammate has to get him out. (Ideally if a teammate got near him, you would shoot the hostage)
I'm not really sure how you would implement that, but I figured I'd throw that out there. And if not, it's a cool name.
"Surrender Or Die"