Hey guys, are you tired of dying. ?

Then do what I do.

1. When you spawn, break a window all the way and get the free money.
2. Buy the gun thats on the wall that shoots fast, but not the shotgun. (FORGOT WHAT IT WAS CALLED)
3. Shoot zombies from round 1 ~ 9 with that gun.
4. When you are going to go down the stairs with the elevator, make sure to camp in there for more money.

5. Open the barries around the security center thing.
6. Run around the zombies with a Stakeout and kill them from round 10 ~ 12.
7. BEFORE round 13 is finished, you leave a mama's boy. (Or some people call it a cripple)
8. Open the down-downstairs and activate the teleporter for power.
9. Activate the defCONS and then kill the cripple.
10. Upgrade your weapon. (EITHEr MP5k OR STAKEOUT OR M14 OR OLYMPIA)
11. Run around the 2nd floor like number 6. from rounds 13 ~ 20.
12. (OPTIONAL) Activate the defCOns sometimes to get more money.
13. If the doctor comes, let him have your best weapon, cause then you can shoot him with the other weapon and get MORE POWERUP!
14. +Rep if this helped!