The Black Ops 3 launch weekend included a 24/7 Nuk3town playlist to all those that pre-ordered which was a great way to level up and rake in that XP.
The 24/7 playlist has now been removed and the map is only available within the Chaos Moshpit (Bonus > Chaos Moshpit).
Nuk3town is not available in regular playlists (it won’t be until Treyarch give everyone the map, this happened in Black Ops 2).
Game Settings have changed. 33.11.12.*. Minor playlist updates. Changes to Arena Pro; Nuk3town now Chaos Moshpit.
— David Vonderhaar (@DavidVonderhaar) November 10, 2015
FYI: Nuketown-only playlist weekend has ended. Nuketown now available in Bonus > Chaos Moshpit for those who have downloaded the map. — Treyarch Studios (@Treyarch) November 10, 2015