ok im not gonna be biased and get too far ahead of myself. there are plenty of good reviews, especially for the SP aspect. but im here to talk about the MP. apparently there are only 6v6 maximum. thats disappointing. some reviews say the suits and powers that come with them could be overpowering. that does detract a bit from the straight up shooting game. then again, so does COD with all the perks/streaks that modify the way anything/everything is done. i like how they mixed aspects from diff games and blended them nicely. things like sprinting, jumping, cloak & shield use up your suits energy, so they are not unlimited. melee, not knifing, was a good choice. the weapons were standard, not scifi style, and can be customized but not sure how many weapons total there are.
review from (i forget) for MP:
The multiplayer part of Crysis 2 is superficially similar to what you might find in other modern shooters, but an elaborate system of unlocked enhancements does a good job of keeping you engaged. Crysis 2 rewards you with experience and levels as you play; you unlock the most intriguing modes only after many hours. Until then, you can expect to sink some time into boilerplate modes like Instant Action (Deathmatch); Team Instant Action; and a little later on, Crash Site, which is a king of the hill mode in which the hill periodically moves locations. In time, you also unlock a capture-the-flag variant, along with two assault-and-defend modes: Assault and Extraction. (Note that in private matches, you can access all of these modes from the get-go.)
These game types all grant a good dose of action, though it is much different from the expansive Power Struggle matches that defined the original. Nevertheless, Crysis 2 differentiates itself from other shooters with the same nanosuit abilities as in the single-player campaign. You can cloak yourself for short periods of time and take your opponents by surprise; escape a sticky situation by leaping to higher ground; and improve your defenses by activating armor mode. The diverse maps give you plenty of opportunity to employ these skills. On the vertical Skyline map, for example, jumping to higher ground is a great way to gain an advantage over a pursuing enemy. On the atmospheric Sanctuary, stealthy players will appreciate the many archways and gravestones that shield them from view when they need to recharge their energy. It's all solid fun, and given the nature of the nanosuit powers, it's unpredictable enough to keep you invested for the long term.
The online gameplay is further energized by a lot of customizability, as well as the promise of weapon and power enhancements always on the horizon. While you can choose from one of a few premade classes, Crysis 2 allows you (in most modes) to create your own class by selecting from a variety of weapons and suit modules. These modules are many and may allow for faster firing rate, automatic warning when enemies come near, radar scrambling, and more. Some unlocks are earned by meeting the necessary skill requirement; others are tied to particular milestones. For example, you might earn a module upgrade by killing 150 enemies while in armor mode. There are many such upgrades and many ways to customize your character. Even match types are flexible. Public matches offer variants in which, for example, time between rounds is reduced or you don't get any nanosuit abilities. Private matches afford the host control over aspects like friendly fire, score limit, respawn delay, and much more.