In nazi zombies how do you get outside?

If you are referring to the original Nazi Zombies, you can't go outside. You can only stay inside. However, if you are referring to the new map Shi No Numa, you have to open the doors to the bottom floor to get downstairs. From there, you open up the gate to get outside

I Know everything thats in the house and could probably tell how you can get out side from the house
But I'm sure you can't get out of the house cause I unlocked every room with my points and I don't see any way how to get out of the house


I. The First Room
-----------------

Windows: 5
Weapons: Colt M1911, Kar98k, M1 Carbine
Doors: Root Cellar, Balcony

This is where you start off. Do not spend more than five rounds here or you
Will be overwhelmed. Where you go from here depends on how hard you want
The game to be; I strongly recommend going to the Root Cellar from here,
Which is the door marked "HELL" (or "HELP" or whatever it says). Going to
The Balcony will make the game much harder, but will score you some kick-
Ass weapons for the trouble. It is also key to an ingenious strategy that
Is detailed below.


Ii. The Root Cellar
-------------------

Windows: 3
Weapons: Double-Barrel Shotgun, Mystery Box, Thompson
Doors: The First Room

You will find the Mystery Box and the Thompson back here. This, in turn,
Is where you will get the almighty Ray Gun if you can get lucky with the
Mystery Box. This room has the least zombie entrances, so it may be easier
To defend here unless the Balcony has been opened up; if that's the case,
Then running and gunning will likely be a better strategy. If you are
Overwhelmed, the side of the room near the staircase and the Mystery Box
Is excellent for last stands, and, with the right weapons, a breakout is
Even possible (though potentially not desirable).

Note that there is a wall that the zombies will break through; this wall
Counts as a window for the purposes of this guide. What's amazing is how
Your character will not only use the Force to repair the wall, but he
Doesn't even need any mortar or concrete. The wall's just automatically
Resealed. I need to hire this guy to work on my house.


Iii. The Balcony
----------------

Windows: 4
Weapons: Grenades, Trench Gun, Sawed-Off Shotgun, BAR, Scoped Kar98k
Doors: The First Room, The Root Cellar

This floor contains the power weapons, but opening it will open the door
To zombie ambushes, because there are four windows up here. You might be
Able to make a mad dash for the BAR or Trench Gun if you're quick enough,
But you may leave yourself or your team open to a zombie rush. Go here
If you want a challenge, or if you feel you or your team needs the extra
Room to move around (usually late in the game, after the 12th round or so).

One reason you may wish to open the Balcony is the staircase in the back
Of the room; if you leave the door from the First Room to the Root Cellar
Closed, you can cause all the zombies to have to funnel down the stairs,
Leaving you and your team able to kill them while they shamble down the
Stairs. This is a pretty good tactic, and several people have pointed it
Out to me. The only downside to it is that it makes you have to run pretty
Far to reach the Mystery Box, but there is enough time between rounds that
By the time the next zombies begin to appear, you should have your shiny
New weapon from the box. However, if you aren't going to be using this
Strategy, don't open the Balcony.

how do you get the other zombie map pack? do you have to be on the playstaton net work?

You can definitely go outside as one of my son's team mates got out, they could also fly and had all the guns. How they did it beats me...if anyone knows please do tell!!!