Black Ops 1: Fantastic campaign, incredibly solid multiplayer, and my personal favorite zombies mode. Black Ops 2: An only okay campaign (pretty forgettable imo), pretty good multiplayer, and a very good zombies mode (started off weak, but Mob of the Dead and Origins came in to save it) Black Ops 3: Terrible campaign (just my opinion), okay multiplayer ruined by awful microtransactions, and a decent zombies mode (not as good as BO1 or 2, Der Eisendrache and The Giant were the only great maps, the rest were "ehh," although I haven't played Revelations yet, and it looks cool) BO1 reigns supreme.