I cant believe a game like Crysis exists in this generation.
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Gameplay
What more is there to say? Crysis throws you (literally) onto an island of unknown suspicious activity in which you (U.S. Special Forces X2) are sent in to investigate. There are thousands of ways you can approach situations, as you are free to pick the way you want to kill. Simply put, it is a sandbox fps.
Graphics
Do I really need to spell it out for you? This game is GORGEOUS, even on high settings, it looks beautiful, and even though we may not see it in full 60 fps dx10 very high settings for another two years, who cares? This game will last you until they invent some type of virtual 3D world in which you are literally in the game. But thats the beauty of this game, is that you will most likely be playing it 5+ years from now because of the graphics being so advanced.
Multiplayer
Multiplayer IS in the game if you didnt already know, and can be somewhat punishing if your new to it, as it is different because it adds the whole nano suit technology into a Battlefield-like match. The maps are huge, and even though it only features 2 modes (deathmatch and *powerstruggle) it has its moments and the replayability. I didnt suffer from any lag that i didnt already have in the singleplayer either, so its easy to play.
*Powerstruggle is similar to an objective based game such as ET:QW where you must capture certain bases or alien technologies in order to build a stronger armada for your team such as alien-based weaponry, alien enhanced vehicles (such as tanks) and nukes (yeah, nukes). then you must destroy the enemies HQ (which is a fortress full of it's own defenses)
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You can blow through the singleplayer story within 7 hours, but that isnt a bad thing because you'll be playing it over and over again, exploring new ways to engage your enemy and other ways to kill them, etc.
Sandbox games arent for everyone, however, because some people need that linear gameplay in order for them to understand or play the game. (the game's own push, if you will) However, if you learn to accept the freedom that you are given and recognize that it is a sandbox game, then you will be rewarded with one of the best first person shooters of all time.