Numbers

Numbers is a single player level in Call of Duty: Black Ops.

The level takes place in Kowloon, Hong Kong. It involves torturing a prisoner as Hudson along with Weaver and Clarke, something the player does himself with context-sensitive commands. When torturing the prisoner, the player will smash a glass window, place a shard from it in the mouth of the prisoner, and proceed to punch his jaw several times.

After the torture scene, the Spetsnaz discover their positions and the player will have to escape the area through apartment buildings and across rooftops. One part in the mission, the protagonists come across a weapons cache behind a fridge after Weaver and Clarke push it out of the way. Raining and lightning from a thunderstorm set for the mood of this mission.

Trivia

 * This is the first level in the Call of Duty series where the player participates in torture instead of being tortured themselves.
 * According to the Official Achievements list, at least one of the protagonists will die in this mission. In the teaser trailer for Black Ops, Mason flatlines and the doctors allegedly "bring him back". This may be what the achievement is hinting towards but it is unlikely.