there is one in every map pack.
You don't unlock "boards", you buy them. Each map pack contains one Nazi Zombies map. Map Pack 1 = Zombie Verruckt Map Pack 2 = Shi No Numa + Wunderwaffe weapon Map Pack 3 = Der Reise
yes it will be Area 51
no one knows
You purchase the 1st map pack for $10 or the 3 map pack bundle for $25
3, there is one zombie map in each map pack.
Only 3 map packs came out
Go to the PlayStation store and purchase the map pack
The default map for Nazi Zombies is Nacht der Untoten. This is the only default map for this game, but if you get the downloadable content (DLC) then the purchasable Nazi Zombies maps are the following: Verrückt (Map Pack 1) Shi No Numa (Map Pack 2) Der Riese (Map Pack 3) As of the time this answer is submitted, there are no other Nazi Zombies maps. But new DLC could possibly be made in the future.
Nazi zombies is already released for 4.99(US) and 2.99 for the fourth map with the second and third map pack free Nazi zombies black ops is 6.99 and it comes with dead ops arcade too =D with 4 player modes
In order to get the "Verrückt" Nazi Zombies map, you must purchase the Map Pack 1 DLC.
I do not know which Nazi Zombies map(s) you already have but I'm assuming your talking about the very latest one, Der Riese. Just in case: Original- Nacht der Untoten (Night of the Living Dead) Map Pack 1- Zombie Verruckt (Insane Zombies) Map Pack 2- Shi No Numa (Zombie Swamp) Map Pack 3- Der Riese (Zombie Factory) Der Riese- It is set in a secret Nazi facility in Germany, and features teleportation and Pack-a-Punch machines, which can upgrade your weapons
There not really random characters; their just added to the storyline.