Crysis 1 was funny. Yes it was really innovative, the stealthy way to play, the weapons, everything was good and different from other games in many ways, but I think that everybody agrees with me when I say that the game, when reached some point, would get really bad.
Repetitive as hell, easy even in a higher difficulty, buggy as hell and sometimes even making you quite pissed with the bugs (getting killed by a wooden crate that you just threw isn't funny).
Crysis Warhead got what Crysis 1 couldn't achieve, which was to give the game itself a non-repetitive gameplay (at least for me it isn't), and giving one of the best endings to a game i've ever seen (Come on, getting that ultra-overpowered weapon is f*cking awesome).
But Crysis 2 was different. They promised giving the PC Gamers a game with probably the best graphics ever, using DirectX 11, something that they didn't. They promised giving the SandBox, and they also didn't. They made PC Gamers unleash all the hatred on them, because what they gave us is a console port which is gradually getting better.
Now, let's forget that and say the truth, Crysis 2 has a really amazing gameplay, a decent story (not the best, but quite good), a nice ending, good graphics running with a better performance then the first ones and probably the best soundtrack ever in a game (Hans Zimmer baby!). The singleplayer is simply good, has a nice ending (better than the ending of the first game, but worse than the ending of Warhead). The multiplayer isn't as good as the singleplayer, it is buggy, I would say it is still a beta and not the final product (needs way more patching).
The main problems of the game, which forces me to give this game a 9, are: 1st- the lack of a good AI, which makes the game kinda bad at times, as the AI will almost never walk (patrol) if they don't see you; 2nd- Crytek don't giving us what they promised at launch (DX 11 and Sandbox); 3rd- The amount of bugs in the Multiplayer that makes it almost unplayable; 4th- The lack of a big, hard and good fight in the ending. The ending was too simple; 5th- Could have a Co-Op gamemode for multiplayer. I think we all are tired of Team Deathmatch and Capture the Flag. They also could have kept Power Struggle gamemode, which in my opinion is the coolest gamemode in a multiplayer game ever made; and finally, 6th- The story could have been developed a bit more, Alcatraz could talk (I hate characters who don't say anything during the game) they could have said what happenned to the aliens in the island of the first game and why there are squid-ish aliens in this game (if there is an explaination I'm probably both blind and hard of hearing), I miss the good and old Matrix sentinels in this game

The game gets a 9.