RPS summed it up about perfectly.
I enjoyed the game, what little of it there was. The campaign is just horribly short, and when I can justify a 6-8 hour campaign on a modern AAA release, this is just beyond too short.
The story is fine, its engaging and interesting enough you want to see it through. Anyone who was expecting a feeling of "America fuck yea" in this game will be pleasantly disappointed (unless that's your thing). There are scenes that are quite unsettling, designed to make an impact and I think they do so efficiently. The ending however, is rather annoying that it just... ends. No real feeling of resolution, maybe a minor feeling of accomplishment, but an overwhelming of "that's it... what?"
And they are right, if the developers wanted to make you feel like you were just a piece of something much larger, they succeeded. Too well, even. The majority of the game your objective is to "follow," even during gunfights. Running ahead is useless. You will either be killed, or stuck waiting at a door or ladder that you can't interact with until the NPC you were supposed to follow catches up and opens the door for you or goes up the latter first, to the point of obnoxiousness.
One of the things I did like was the use of QR codes in the environments as wall graffiti. I've found 4 or 5 of them thus far, and they don't really bring up much, a few downloadable phone backgrounds and a video / pdf. Either way, I find the concept neat.
After some back and forth I decided to give the multiplayer a try and found it... surprisingly competent. The maps are good, I like the spawn points, the ability to spawn in a team vehicle is a nice touch, as well as the ability to unlock your bonuses in mid game (RPG, flak jacket, etc) with the points that you accumulate.
all in all its not a horrible game, I'm quite glad I've played it, but average is a fitting score for it.