I decided to simply copy and paste my review from Black Ops 2 and use it, almost word for word, in my review for COD Ghosts. I figure it fits with the whole Call of Duty theme, since they like to copy and paste about 90% of their game content as well.
The Campaign is about as generic and uninspired as it gets. Some foreign terrorist group is threatening the lives of millions for whatever reason, and you're squad has to stop them. But let's be real, hardly anyone actually plays the Campaign, since you know, it is so bland and generic.
Multiplayer is essentially the same thing it was in 2009 when Modern Warfare 2 was released, and it will likely be the same until people finally wise up and stop buying COD every year. Oh, I forgot, they added some new weapons and maps and tweaked the perks and killstreaks. It doesn't change the fact that multiplayer is still the same, repetitive, lag-infested experience every year.
Since this is an Infinity Ward Call of Duty, a Zombies-knockoff is included, except this time, it has aliens instead of zombies. It's basically a mashup of Zombies and Spec Ops from MW3. With aliens. That's it.
So to sum up, it simply isn't worth paying full price for COD Ghosts, since it is a game that runs on an outdated game engine, with outdated graphics and boring, stagnant gameplay. If you must buy this game, then just be aware that innovation and improvements are practically non-existent in Call of Duty.