Certain perks if used to many times will disappear. They will not return.
If you are talking about the mystery box look on a wall near to the box when it disappears and it should show a map with the location of the box (if the power is on).
You actually can't get outside in Nazi Zombies but if you battle online or offline you can go to Airfield. It takes place in the backround of Nazi Zombies.
Go up into the projector room and at the back of the room there is a upgrade machine....youhave to pay 5000
Nazi Zombies is not on the DS retaird.
it is endless
it does not end
It restores some HP it is frequently bought in vending machines
Go to credits and watch if you want to and at the end you will get zombies : ) =)
Having a vending machine is something that is not a necessity, although it is nice for your staff as well as visitors. It is often worth purchasing the vending machine yourself so that the profits from the machine will go to your company rather than renting it from a vending service.
No, stop playing Nazi Zombies and go outside.
online: go to cooperative, then go to play online. After that, go to find game and click on nazi zombies. local: go to cooperative, then go to split screen. Click on settings and go to game mode. Next, click on Nazi zombies.
Go to zombies hit split screen
one glitch is upstairs go to were you can buy gernades buy them and sit right there and the zombies cant go towards you