This map is set within a German theatre.
Kino Der Toten
This map is the first to introduce Hellhounds.
Shi No Numa
In order to activate secret songs within Black Ops 1, a player must interact with these.
Meteorite fragments / 115 Rocks
The drunk russian who always wants vodka.
Nikolai
The Jet Gun / Thrustodyne appears in this many maps.
2
(Tranzit & Liberty Falls)
This map was rumored to take place on Mars.
Shangri La
This is the first map to introduce area specific music stingers and tracks.
Mob of The Dead
This map uses the "Ascend from Darkness" steps from the Black Ops 1 Campaign as it's main easter egg steps.
Origins
Richtofen's lab partner.
Ludvig Maxis
This iconic wonder weapon appeared in its game's campaign before zombies.
Ray Gun
This map takes place primarily underground, and features a friendly helper.
Buried
Deadshot Daquiri made its debut on this map.
Call of The Dead
A golden weapon obtainable on Mob of The Dead
The Golden Spork
Call of The Dead features this famous director as a special boss zombie.
George Romero
The Winter's Howl becomes this when Pack-A_Punched.
The Winter's Fury
This map is created from a portion of a multiplayer map from the same game.
Nacht Der Untoten
The Carpenter power up first appeared on this map.
Der Riese
The achievement / trophy name for completing the Mob Of the Dead easter egg quest.
Pop Goes The Weasel
The prisoner known as "The Weasel".
Al Arlington
The Thundergun has appeared in maps this many times.
8 Times
Kino Der toten x2, Ascension x2, Nacht x2Revelations, Tag Der Toten
This map does not feature Richtofen or Samantha Maxis, but are mentioned heavily by the playable crew.
Terminus
Five was the first map to introduce this now staple feature to COD Zombies.
Buildables
Voyage of Despair had an extremely hidden easter egg which featured morse code flashing through these.
Stars
What each letter in S.A.M stands for.
Synaptic Algorithm Module
What the "DG" in Wunderwaffe-DG2, stands for.
Die Glocke
(reference to a real world Die Glocke which was to be an ultimate secret weapon.)