In theory, this should be a great game; brilliant innovations with regards to objectives, customisation, and movement - but somehow the game seems very "thrown together". The single-player campaign is short, and very sporadic, there isn't really a "story" to it, at least not a very good one. The single player gameplay is more or less a massive disappointment, the AI is clumsy and useless at the objective-based side of things, and to be honest the "parkour" aspect is very clunky and doesn't fit in well with the setting of the game. The campaign is playable, and even exciting at times, but this is short-lived as you will find yourself finishing both campaigns in about 2-3 hours. As for the customisation, it is better than the likes of Call of Duty or Medal of Honour, but it's still nothing to write home about, and as far as the weaponry goes it leaves a lot to be desired, there is no variety, and the attachments are poor to say the least. I can't say the online aspect redeems the shortcomings of the singleplayer campaign, because to me it seemed more of the same.
I had wanted to give this game 3 stars, and truthfully I still do - the game does have it's moments of excitement, but these were only momentary and don't speak for the rest of the game. Unfortunately I had many more bad things to say about this title than I do good things, which is a shame - it had so much potential. I wouldn't spend more than 20 pounds on this game, you'd be wasting your hard-earned dosh! Feel free to give this game the benefit of the doubt and give it a try if you see a good price for it, but for me it was nothing short of a disappointment.