This allows you to access Dreamland and play Zork, which unlocks an achievement.

Central Intelligence Agency Data system: A computer accessible from the main menu room allows you to browse the contents of a CIA computer and enter various cheat codes.

Teddy Bears: Various Teddy Bears are hidden throughout the single and multiplayer modes.

It is part of the quote ' And happiness is thought to depend on leisure for we are busy that we may have leisure, and make war that we may live in peace.' ' WE MAKE WAR THAT WE MAY LIVE IN PEACE' - Aristotle

S.S.D.D.: If using noclip console command, it is possible to see that one of Rangers that is sitting near several M16A4's at the start of the level has dog tags.

No Russian: In the mission there are two cases which appears to be Modern Warfare 2 on the front and Modern Warfare on the back, it can be spotted on the back of the case as the player walks up the escalators or stairs to a store on the left.

A message spelling out 'THE DRWANTSTHEULTIMATEPOWERBASTARD' can be found within the four characters' biographies.

Der Riese: Various easter eggs: This map contains a lot of different hidden surprises, including radio messages, the hidden song Beauty of Annihilation, and a game of hide and seek which unlocks an achievement.

Shi No Numa: Various easter eggs: a hidden song called The One and radio messages.Verrückt: Lullaby for a Dead Man (hidden song): Plays after flushing a toilet three times.Nacht der Untoten: A radio which plays different songs.

Little Resistance: Ray Gun: Use a Ray Gun in the campaign.Crossroads (United Offensive): Cow: A giant cow in a hidden room.Come Out Fighting: UFO House, Secret Wall.

Operation Little Saturn: Giant Red Apple.Underground Passage: Ghostly room, Kaiser Bear, Sticky Bear, German dance party.

Custom zombie maps waw easter eggs