Battlefield 4 has already set the bar pretty low with a campaign mode that clocks in at around four hours, as noted on Worlds Factory. Well, prepare to have your socks blown off with Call of Duty: Ghosts' campaign mode, because it clocks in at around four and a half hours on the regular difficulty setting. [...]
Nevertheless, it should be noted that most people buy Call of Duty games for the multiplayer anyway. So an increase in replayability on the multiplayer front at the expense of a less bombastic single-player campaign can't be viewed as all bad. Besides, with split-screen gameplay, new co-op modes and that almost tempting looking Extinction addition, you can't exactly say that it's bad that Activision had Infinity Ward give up four even less memorable hours of the campaign to focus on something that actually adds value to the game. [...]
http://www.cinemablend.com/games/Call-Duty-Ghosts-Campaign-4-Hours-Long-60316.html
Para que definitivamente han hecho como otros FPS y se han centrado en el multiplayer únicamente.
