First off, the graphics in this game are nothing short of incredible. They are hands down the best I have seen on consoles, and better than quite a few PC games as well. Considering the age of the 360 in particular, this is quite an achievement. In addition to the graphics, the city itself is gorgeous and highly varied throughout the main story.
Next, the gameplay. Too many shooters today more or less copy the same mechanics that Call Of Duty 4 succesful, not that its a bad thing, but it gets old fast. Crysis 2 introduces fun and exiting gameplay to the FPS genre in the form of the nanosuit; The nanosuit has three main functions, stealth, armor, and power. Each of these allows for many different play styles and tactics when engaging the challenging enemy AI.
It is worth mentioning that a few reviewers have been somewhat unimpressed with the AI, claiming it is unintelligent and glitchy. Across the whole campaign I noticed only one AI glitch, and it was somewhat minor. I played the game on Soldier the first time through, and was consistently challenged by the AI, which reacted intelligently to virtually every tactic I used against it. Unlike many modern shooters, the enemies of Crysis 2 move freely around the environment in response to your actions, and act as a team to bring you down.
The sound effects in this game are top notch, and they are accompanied by an incredible original score by Hans Zimmer (the guy that did Inception's soundtrack). The overall presentation of this game is simply superb, and overwhelmed me enough that I had to stop playing several times just to take it all in.
The multiplayer combines the interesting tactical options of the nanosuit with unpredictable fellow players to make an engaging experience. There are a few balances that need to be made, but overall it kept me coming back for more thanks to the vast array of suit and weapon customization options.
Sure, there may be a few slight issues regarding bugs, but none of these even slightly hindered the rest game's incredible aspects for me. The campaign easily has to be the best I have played since the original Halo, and lasted nearly 12 hours.