Ed Squad 75

I want to create a game type for my forge map "Lava Pit". You basically knock people off the edge of the map or in the center of the map on vehicles until you are the last man standing. Unfortunately, I can not find a "Last Man Standing" game type, and I am not finding an option in the game options that lets me do this. Does anybody know where I can find this option so I can play my Lava Pit match without having to wait for the time limit to end to start the next round? Because I would love you. Like, forever. ~Ed Squad 75 (PS: The attached file is a picture of the arena that is Lava Pit if anybody cares to see (Sorry if the quality isn't great.).)