1st thing you do is buy the the quick revive cola.

Then stay in the 1st room as long as you can so that you will get at least 4000 points, then you buy open all the doors (bottom or top route) so you will make it to the stage.

Turn on the power and link the teleporter pads. Buy the claymores and the turret. Set up claymores around the teleporter.

Buy a juggernaught cola and buy guns from the wall or the mystery box that you find along the way.

Then stay on the teleporter as long as you can until things heat up and then teleport to the pack a punch room.

When you're up there throw grenades at and around the turret because that's where zombies will stand when your not there.

Throw as much as you can and keep refilling your grenade inventory on the wall (250 points).

When you teleport back to the first room, all the zombies will come from the door leading inside the theater.

But leave the last zombie to walk, crawl or run around, that's how I stall time at the end of the rounds.

This gives you time to rebuild barriers and buy ammo and guns. But keep the the last zombie alive so the teleporter can cool down.

Then when the teleporter is done cooling down link the pads and kill the zombie. Then just repeat everything again.

Stay in the teleporter as long as you can and teleport again. Throw grenades out of the pack a punch room and teleport back.

Stall the last zombie and allow the teleporter to cool down again. Link the pads an repeat. This will take you 20+ rounds.