(adsbygoogle = window.adsbygoogle || []).push({}); Before anything else, i want to name some spots on the map so it wont be as confusing. I'll be naming the teleporters. The teleporter closest to the gewher ( In the begining room) is teleporter A. The teleporter in the very back of the map where you can buy a Bowie knife is teleporter B, and teleporter C is located near the buyable type 100.

Now that we know the spots onto the guide.
Level 1-3
Obtain enough points, let the zombies enter through the barriers to recieve some power ups. Knifing them at an early stage will give you an advantage points wise.

Level 4-12
At the begining of level 4, open up the two doors by the side of the Gewher. You should also have enough points to obtain a Trenchgun. Use the Trenchgun and obtain enough points until you can buy off the pile of boxes blocking your way to the power. Then, turn on the power and camp by the box until you have enough points to obtain Juggernaug. If you have enough points, you can go ahead and try your luck by the box. You will be camping by the box or by teleporter B at this point. You should try to link all 3 of the teleporters at these levels. Have a friend stay by the main teleport (first spawn point) as you link the teleporters together. Get in the teleporter and you should be by your friend. Repeat this step until you have all the teleporters linked.

Level 13-Beyond
At this time you should already have decent equipment. When you have enough points, go upgrade your weapon. Note that this is Der Reise, and it is harder, so you have a higher chance of obtaining a decent gun. With your upgraded weapon, you should then camp by Teleporter B. If you are playing with a party of more than 2 people, have 1 person covering the top stairs, 1 other person covering the bottom stairs, and the third person covering the front where the most zombies will come. If things get too hairy, you can use the teleporter to instantly get you out of that situation or you can retreat to the top stairs and try to hold your ground until you have to drop down. When you do drop down, thats when you turn the bridge electric barrier. This spot should last you at least past level 15.

I hope this guide will help you guys out. Rep+ if you like it!

If you need amo try and get a crawler (crippled zombie with no legs) and keep using the teleporter until you get it. but sometimes you will get dogs :/