At the start, half of the players buy an Olympia, and the other half buy an M14.

When everyone has 1000+pts, all of you buy Quick Revive (cost - 500pts). After that, when you all have about 2500pts, one of you open the door upstairs (cost - 750pts). There may be the random box in there. If so, each of you open the box twice.

Then go camp in front of the barrier in the room with the portraits. One of you guard the barrier, two of you guard the opening, and one of you guard the roof. This should be a good tactic for a while.

At about the time when everyone has about 5000pts, someone open the door (cost 1000pts). The box may also be in there, but if not, all of you buy a stakeout. Camp by the door down the stairs, and if you get crowded, hold down 'X' / [] and the door will then open (cost - 1250pts).

If the box is in there, only open it at the end of the round as that is a very dangerous and crowded/horded area. Once done, camp by the big grey double doors and use the same advantage as I told you on the other door. The cost of the door is 1250pts.

In the backstage room, there mak be the random box, and the power switch is located at the very far end. Only turn on the power when you are crowded, as turning it on causes the 'Creepy Crawlies' to come.

Link the two teleporters, and then camp in the big blue one. When you get crowded, one of you hold down 'X' / [] and you will teleport to the Pack-a-Punch room. This will give you a chance to upgrade your weapons.

Using these tactics, you should be able to make it from here.

NOTE: My highest round is 49 (solo) and 83 (co-op). We did not glitch, and we were on the Xbox 360!

Thanks for reading and please rate!