Cracked was first seen being played by community VIPs during the multiplayer reveal for the game. It's also the basis for the singleplayer campaign mission, The Defector. In the middle of the map there are one or two buildings with lots of cracked terrain, hence the name, Cracked. This is where the B flag for Domination is located.
On the map it is possible to see the "Peace" symbol, which was common in the 1960's.
In one of the north-west buildings on the minimap there is a clock on the wall that goes exactly the same as the player's local home time. It is in the house closest to C3 on the mini map, on the ground floor against the stair case.
The bus found in this level is the same bus found in Hanoi.
In the early stages, this map was going to be called Slaughterhouse, just like the level "The Defector".
There are two signs that are direct references to the final scenes of the movie. The red MỸ TOÀN sign can be seen above the small tiled room in the north-west area of the map, and the blue TÂM PHƯƠNG sign can be seen on a building in the background in the south-east area of the map.
The beds on the map that are found in many buildings can block explosions from Grenades, Semtex and C4.
Written on the wall near one of the teams spawn points is "Phai Trai No Mau", which translated from Vietnamese to English means "Pay with blood".
This map appears to be a remake of the map Moscow in Call of Duty 2, as they share multiple similarities.