if you are having a hard time on Nazi zombies and constantly running out of ammo, i can help you.One of the "tricks " i have to offer is easy for experienced gamers and non-experienced gamers. first what you do is grab a boey knife and let a zombie down you. next you have somebody revive you(or if you are on single player have the quick revive machine revive you. This step is the most important. DO NOT PRESS Y (Triangle for ps3) AND YOU WILL HAVE YOUR BOEY KNIFE OUT.THEN YOU RUN OVER AND BUY A GUN OFF THE WALL. FINALLY PRESS Y OR TRIANGLE 3 TIMES AND YOU WILL HAVE THREE WEAPONS.
oh and a few more things. message this forum if you need any help with zombies or the campaign i will be able to help. secondly message me if this helps.