"The basics" intented for new guys to the game

Me and my friend start with two windows each at the start and shoot the zombies in the chest five times then knife em. Then we repair ALL windows in the first room until we are finished with level three. After that we run into the first door, the one up the stairs to the right, then we just run further and into a door that leads down some stairs and into a larger room with two stairways, etc., you probably know where I mean. 

Here both buys the shotgun stakeout and split all the kill until round 8 is over. We share the kill rate so we have about the same money all the time. After round 8 we run through the next two doors to so we come to the cinema and turn on the power immediately. When where in the cinema we both buy juggernog. 

Furthermore, we run around the whole map in large circles, from where we started and the way we did in the beginning of cinema through the door to where we started again. If you run this round, you get lots of zombies behind you, you can either turnaround and throw some grenades or swap on some traps to kill them all. Furthermore, we go in the mystery box till we both get a powerful machinegun (famas, Galil, commando, RPK, etc..) And these we upgrade as soon as possible. Now we’ve reached about round 12-13 and we spend money on Speed Cola, Revive and eventually Double  tap beer. Then we are upgrading to a new weapon that we receive at random box. 

The most important thing is to throw grenades so you make couple of crawlers because they are so slow. In the end of each round we leave a crawler so we have time to prepare ourselves for the rounds to come. We try to calculate some ammo use. There will be dogs around each fifth level and they always give you max ammo. So, if there are dogs we always have an ammo spree because we'll get max ammo anyways.

I would recommend saving some money and always have over 4000. If die then you have enough money to get back, and buy a weapon in the mystery box and juggernog.