The Call of Duty Black Ops 3
Currently, the Nuketown map is only available to those who pre-ordered Black Ops 3, with your only chance of obtaining the map if you didn’t pre-order the game is to buy a code from eBay for example.
However Nuketown may be available to purchase separately as a piece of DLC from January 26 as the listing states, meaning that the map will no longer be exclusive to those pre-ordered the game. Although no price is listed.
Those on Xbox One and PC will have to wait longer before being able to grab the Nuketown map as Activision and Sony currently have a nice little deal going on where PlayStation users receive DLC before anyone else.