I didn't really enjoy this game.
You stated that you didn't play Black Ops 1 when this is a sequel making the single player absolutely useless because you have no fucking idea what happened in the first one. I enjoyed the story but it was too short.
The multiplayer is just a rehash, and the only original idea on there is the Pick 10 system which is ok.
The zombie mode feels stripped down and doesn't feel fun anymore.
I give the story a 8/10
I give the multiplayer a 4/10
I give the zombies a 1/10