Get a 25 kill Streak
And change your kill streak settings so it will give you a nuke on the 25th kill and unlock it
Chat with our AI personalities
Wrong game to get a nuke on
You can Nuke Boost by using Tactical Insertion or you can simply just be on good form; killing anyone.You can also watch some tips on Youtube.
you can't get a nuke in black ops, but the multiplayer map Nuketown gets destroyed by a Nuke at the end of the match
as far as i know, the only "bonus level" in cod mw 2 is the museum, unlocked once you have completed the entire story. there is no missions to be done in that level, you can only look around
go to super nuke bros mellee and loook for it