In Call of Duty: Black Ops 2, there are two different version of Nuketown that people seem to be confused about.
If you pre-ordered the game, then it should have come with the Nuketown 2025 map, however this does not include the Nuketown Zombies map.
The Hardened Edition of Black Ops 2 is what came with the Nuketown Zombies map.
If you didn’t purchase the Hardened Edition however, there are still a couple of ways to get the Nuketown Zombies map.
First, you can still purchase the Hardened Edition if you’re a hardcore CoD fan.
Secondly, you can purchase the Season Pass, which is supposed to include the Nuketown Zombies map.
Lastly, you can purchase a Hardened Edition DLC code from Ebay. There are a bunch of people on there (at the time of writing this article) selling their DLC code, though I really wonder why they purchased the Hardened Edition in the first place then.