(adsbygoogle = window.adsbygoogle || []).push({}); I assume you know the basics about this level so I'll keep it straight to the point:

1. When you start the game, stay in the first floor for a couple of rounds. Up to round 3, try to only use your knife. You will definitely get more points out of it. And if you feel like you are being over swarmed by the zombies, open the door for 750 points. I usually go up to around round 6 before i use the elevator, but clear the debris for 1000 points in case there are too much zombies for you to handle so you and your teammates have an escape route to the second floor, the war room. But if you have it under control, then get to the next floor when you have killed all the zombies that round and you think that you should go to the next floor.

2. This floor has four windows without opening the next barrier, so full team would be helpful in racking up a bunch of points. If you had enough money, leave one or a few zombies alive and go straight for the power in the next floor in the laboratory and back to the second floor. If not, go for the MP5K to the right or the Stakeout after the next barrier by the next elevator. Rack up enough points to turn on the power and open the two barriers downstairs of the second floor. The barriers downstairs aren't mandatory if you have to save money for other things like perks and weapons. If you want to you can search for the mystery box in the laboratory. Look through the windows before you open the doors to find the box since they are 1250 each to save money. Claymores will help too for 1000 points. You get 2 claymores every round ,but you get 2 claymores max each round. It still helps.

3. What ever you have done to stock up in ammo, weapons, ect... get to the second floor. With the power on, the pentagon tech, or the thief, will now be able to show up to take your weapons. To get ready for the thief, go upstairs to the far side from the stairs and set your claymores if you have any. If you see him, that means you are his target. He will be invisible to everyone else. He will walk to you unless he has received any amount of damage. When he starts to chase you, switch to your lighter weapon so you can evade him faster, and have your teammates try to take him out. He's invisible to the people he is not chasing unless he has already gotten you, but if you cannot see him, he is a really faint red blob followed by a very noticeable trail of numbers. Shoot in front of the numbers not at them. As for the person being chased, run in circles upstairs until he get you or he dies. If he is about to get you, then switch to your weaker weapon so he doesn't take your better weapon. Don't worry about wasting ammo, you will get max ammo even if you do not kill him. Worry about losing your other weapon, so try your best to kill him. You will get your gun back with max ammo if you manage to kill him. If you kill the thief without him taking anyone's gun, he will drop a pack-a-punch bonus that will put you in defcon 5 and make all the teleporters lead to the pack-a-punch room that will temporarily cost 1000 points instead of 5000. If you kill him and he has taken someone's gun, he will drop a sale bonus that will make the mystery box appear everywhere it can be found, and it will sell for 10 points instead of 950. He will have more health the more people on your team and as the round progress so be ready for him. He reappears after about every 5 rounds or so. It is also possible to kill him with a nuke or insta-kill. This is my help for the pentagon tech.

4. As for every other round that doesn't have the thief, this is your guide. It must take place in the second floor. It will be much easier if the downstairs barriers are cleared, if everyone is in the second floor, if you had claymores, if you had powerful guns, and if you have upgraded weapons. Ammo is a big problem so it would be helpful to have a weapon that has accessible ammo close by and if your guns are upgraded. So to start, turn on all the defcon switches except the one by the downstairs elevator. Wait a while for a few zombies to come out, but do not wait too long because the zombies will cut through the middle through the teleported, then quickly go to defcon five and go into the pack-a-punch room. Check the two windows for zombies, place claymores in the hallway to the door, then get into a position that lets you able to see the door. Above the door there is a sign that says "Defcon" with a number next to it. The number starts at five and slowly counts down to one. When it reaches one the door will open to the war room then lob at least two grenades out (Why two? You get two grenades every round), shoot them, let them trip the claymores, then make your way outside and just go around in circles on the bottom of the war room and occasionally turn around to blast some zombies. Many things can go wrong! If you are not looking where you are going, you could caught up in some machinery by the wall, or a zombie could get in your way and block or trap you. You might go to slow and get swatted by a bunch of zombies. You could be too fast and the zombies will start cutting through the middle through the teleport. Just be cautious and improvise when in danger.

Other things that can help:
-Ray Guns and the Winter's Howl will really help killing and slowing down zombies but they might not have enough ammo to help you alone
-If someone is down, throw a monkey bomb to distract the zombies and revive them quickly
-When leaving one zombie alive to find the mystery box, get perks, board up windows, or anything, try to make it crawl by setting of an explosion near it to blow its leg off like throwing a grenade at it
-Max ammo gives you more monkey bombs, claymores, and grenades
-Try to have a gun that is accessible in the room that you can go to for ammo... just in case
-There are more zombies if you have three or four players than if you had one or two players
-Just repeat steps 3 and 4 to survive as long as you can
-In really high levels, snipers are really helpful
-Just doing these things will not guarantee you being rank one in the world. You must be good at this game and have the basics down like aiming and avoiding danger.


This is the strategy I use. It is the one I find most useful in reaching levels in the 20s before dying. Have a way with communicating with your team so you can alert them and protect them like saying, "There's a zombie behind you!". If you do not have a mic, then call them if they are your friends. This is all I have to offer, so try to rank high in the leaderboards in glory to proudly say, "I am a zombie… PWNER!"... Not really. But this will take you far. Good luck!