Yes, I remade
this.
Legodude77 is the hoster!

Players spawn in a waiting room with one gun. Friendly fire is off, of course. When a player enters the arena, they are teleported to it by the controller, preferably me. Players can enter the arena by being bought for 300 points, or when a new game begins.
The menu:

The arena:

The arena with all upgrades:

Another view of all upgrades:

The control room that the controller (me or another admin) controls the arena from:

Spawn room:

Closer look at the fort with all upgrades, the control room window, and the turret.

Players fight waves of zombies, earning points after each round based on the wave's difficulty. Points can be used to buy arena upgrades (mines, fort, moat etc) or weapons (switchblade, molotiv, rocket launcher etc).
WHAT'S NEW IN VERSION 2There are now
24 rounds instead of the 10 I had before.
Score can now be changed directly from the control room for faster time in between rounds.
More strategic spawn box placing so zombies to not head to waiting players.
More upgrades for field weapons. (Lava, moat, wall, and turret now have 2 upgrades instead of 1 upgrade. Fort now has 4 upgrades instead of 2.)
12 weapons, instead of the old 8 for a wider variety.
Rare "wager" moments, where the controller may make a deal with the contestants, such as "Fight 7 smokers at once! Win and get shotguns for all of you! Lose, and your fort loses it's 2 most recent upgrades!".