Hanoi is a multiplayer map that appears in Call of Duty: Black Ops. It is a medium sized map, with a prison inside and a barricaded street along the outside. Taking place at night, the map is quite dark.
The location of the map is a North Vietnamese Army prison, based on the real-life Hanoi Hilton.
Standing in front of the movie projector on this map will not block the screen, and the numbers are still seen on the screen.
In the interrogation room, there are bloody tools, blood on the ceiling, and bloody hooks.
The movie projector shows the countdown of "3, 2, 1" and then a white background.
The clock on the wall next to the projector screen displays real world current time.
Below the gallows, there is blood dripping and forming a pool on the floor.
In the room with the pool of blood, if the player listens closely, it is possible to hear strange noises and occasionally chairs being moved.
The door into the room with the projector has the words "re-education" on it. This is a reference to the NVA tactic of forcibly brainwashing capitalist enemies with Communist propaganda, effectively converting them into fifth columnists, using repetitive film and audio to break down the minds of their captives.
Near the SOG spawn, there is a balcony with a ladder leading up to it. If one tries to shoot in between the wooden banister on the balcony, an invisible barrier stops the shots. Also, Semtex will stick to it, and appear as if it is floating.
In Theater mode, if one goes up to the tower with the light projecting out of it, one can see that there is no lightbulb or other any other source of light.
Near some of the cell blocks, there are some rat tunnels and holes in the doors, implying that some prisoners have broken out.