Reviews for Black Ops: Declassified are scarse but early reports suggest that the game is pretty poor, especially in terms of single player content. Game Informer’s editor Dan Ryckert has tweeted some initial thoughts, and managed to complete the main story mode is around 42 minutes.
Furthermore, the other single-player missions took less than five minutes to clear, making the entire single-player component of the game less than a hour long. Pretty sh*t considering the game is being sold as a full priced title. Until more reviews come through, it’s best to avoid the game until further notice.