|The subject matter of this article was cut from the final version of a Call of Duty game.|
Underwater is a canceled multiplayer map that was planned to be featured in Call of Duty: Black Ops.
Underwater seems to be a map of an underwater facility, possibly based on the underwater facility from "Redemption". The symmetry in the map would make it a good, fair game for both teams.
The map might have been scrapped because aircraft-based killstreaks, such as Rolling Thunders, Care Packages, and helicopter support, would not have been logically possible in this map, as it is underwater.