Nazi Zombies is all about survival, so I decided to put a guide on. As you know, there are endless waves of Nazi Zombies, so they'll never stop coming at you.

On the walls, there are chalk drawings of guns which you can buy. Here are the guns, and their costs:

Kar98k - 200pts, M1 carbine - 600pts, thompson - 1600pts, double barreled shotgun - 1200pts, trench gun - 1600pts, BAR - 1200pts, sawed off double barreled shotgun - 1500pts.
They were all the guns, so whenever you are out of ammo you can buy one of them to survive - or the random box.
The random box is a cuboid shaped box, full of guns. You open it, and it gives you a random weapon.
You want to aim to get a raygun, which the German, and Polish, people tried making during WWII. It shoots a green ray, made by element 115.

Now, if you are playing online, I like to do this - someone look outside the building while standing next to the steel hand grenades, another guards by where used to be a door, another guards the barrier and fixes it, and another looks down to the first room while standing next to the guy guarding the barrier. The important thing is the grenades. Make sure you are plentiful of them, you never know when you need them. At the end of every round, you get awarded by 2 grenades. Be grateful by this, because grenades helped me survive round 19.

As soon as you start, either buy the kar98k or the M1 carbine when you have points, and also use your colt M1911 45, before it becomes completely useless. If you want your points to be continuously be going up by 10 every second, then on a low round, let a zombie start breaking down a barrier, and when there is only one plank of wood left, start rebuilding but whatever you do, don't kill the zombie. He'll be taking planks off while you put them back on.

At the end of every round, turn the last Zzombie in to a crawler by simply making a grenade detonate slightly behind him.
When he is a crawler, repair all barriers to get points and stop Zombies coming in so soon. Before you kill the crawler though, open the random box when the question marks (?) go solid gold. This way you should get a raygun, browning M1919, deployable MG42 or a deployable FG42. For

Rebuilding a barrier, you get a total of 60pts, which makes 10pts per plank of wood you repair. Make sure when rebuilding a barrier you look behind you a swell, as the Zombies can come from anywhere. For shooting a zombie, you get 10pts, knifing them, 60pts, and killing them, 130pts. For doing headshots, you get 60pts.

Using your skill and this guide, can you survive to my solo record, which is 25 or so. Good Luck!