Inspired by SirLancelot's Zombie Games, it's almost the exact same thing. I loved it one year ago, I started but never finished. But I finished it last night. Basically the contestants face rounds of zombies, and after each round, they earn points based on the difficulty. With those points they can either buy new weapons such as shotgun or guns akimbo, buy another player from the waiting room, or get land upgrades like forts, turrets, mines, lava pits, and more.
Pictures!
Arena with no upgrades:

Arena with all upgrades:

Another view:

Chart:

Waiting Room:

Control Room:

Control Room (other side):

IF I get permission I will host this on SirLancelot's server, and if not, mine.
KNOWN ERRORS: OnBotTouch wont respond with zombies, so the lava pit will not work. Lava pit may not be purchased as of now. If I could get an OnZombieTouch that'd be nice.