Got the PC version, one of the worst ports I've ever seen, in addition to the game itself not being very good. Some missions I can't even get 30fps on the lowest settings it's so poorly optimised, and I have no issue maintaining 60fps on much more graphically intense games like The Witcher 2, BF3 etc on med - high settings.
In addition to that it doesn't feel at all like the other GR games, really been dumbed down. I had to put it on the hardest difficulty and even then it's not even remotely challenging, especially since you're almost invisible and have x-ray vision. Small linear maps, scripted sequences everywhere, forced combat sections when stealth could have been perfectly viable, terrible AI, incredibly low res low quality pre-rendered cutscenes (the volume of them is also about half that of the rest of the game for some reason).
Steam version and other PC versions didn't match for a while which resulted in constant disconnects, now the versions are the same but it still suffers from constant connection issues. Multiplayer is really poorly designed, it matches you with people of similar levels but only for your team, which for me resulted in a team of level 1 players getting put in a match against a team of level 30ish players. Guess who won
Another case of "we want the CoD audience". Stay away.