I wouldn't say this game was terrible...but that's about as good as this review will get. I'm quite surprised that some have rated this so highly and compared it to FAR superior games.
As others have mentioned, the game is buggy. The enemy (AI) randomly run towards you, I have often got stuck in an area unable to get out and had to restart the checkpoint. One time I even fell through the ground and was looking up at the map from below.
Graphics are outdated for a game this new. It's like a cheaper version of sniper elite - if you could believe that were possible, mixed in with maybe the first MOH ever made? Story is nothing original and each mission/map seems the same, just a few things moved around. The gameplay is incredibly linear with a lot of paths/possible vantage points blocked off by rocks or branches you'd think you could jump over. He can't even climb a ladder into a snipers nest! This makes for a very boring, repetitive game, which I have now stopped playing as a result.
If you have nothing better to do then go for it, but there are far superior games out there. Compared to Crysis 3 for example, over a year older, over half the price, far superior storyline, graphics, maps, and gameplay. Altogether this game is disappointing in my view.