HT Games
No, you do not need an Xbox Live subscription to play on Nuketown 2025 in Call of Duty: Black Ops 2.
Nuketown 2025 is a base game map, not downloadable content (DLC), so it is fully accessible in offline modes such as local multiplayer, combat training, or custom games against bots.
However, an active Xbox Live Gold (or Game Pass Core) membership is required if you want to play online multiplayer matches with other players over the internet.