This game improves from the original Crysis's faults to make a almost flawless game.
The graphics in the game are the best I've ever seen (and I have played a lot of games). The textures and objects details are just amazing, especially the faces of people are exceptional they even have pores!! Just look at the quality of the engines graphics and you will be blown away by how far computer games come have.
The game play in crysis warhead is brilliant. You can to a basically do thinks how you like to. For example you can snipe the KPA from a safe distance, or you can sneak into their base and set up claymores and detonated c4 and use it from safe distance, you can march right in with the shotgun and rifle and take them out as you please… what ever floats you boat. You also have attachments for your weapons which allow you to quickly swap between a silencer or laser pointer, grenade launcher, different scope which ever you believe is needed for that situation.
The AI in the game is intelligent in the sense it will find you with a decent efficiency, so if you sniping from far away, they will eventually pinpoint your location and sneak up on you, or if your hiding in their base hoping they wont find you – think again.
The game also uses variety in the enemies between the aliens and KPA as well as a bit of variety of the missions. For example there is a hovercraft part and a train mission where you're on the train passing A LOT of KPA on the way.
The improvements this game has over the original Crysis; more action, no where near as much time spent running from one place to another, more in depth protagonist, a few more weapons; the addition AY69 machine gun, grenade launcher, mines, claymore (single player) and the nano suit grenades. Also the game supposedly optimised the game engine for the higher system, which some people claim is true and others say untrue, I personally get another 6-7 fps on the enthusiast settings compared to the original crysis with the very high settings.
The game also brings variety to the game play instead of just fighting KPA, KPA, KPA, KPA, alien, alien, alien like in the original crysis, now you fight KPA, KPA, KPA, Alien, KPA, Alien, Alien, KPA,KPA etc and some part your even versing both KPA and the aliens which imo is a good thing.
With the game you also receive the Crysis Wars disc which is the multiplayer part. The multiplayer is essentially the same as the original with the addition of the team instant action option. The multiplayer is also outstanding with a few different modes from death match to power struggle which will satisfy people for a long time who are into multiplayer.
The negatives to this game imo are the short single player which only lasts a few hours, however the game is half price at $30 so this does make up for it. The other negative would be the hardware requirements of the pc required to play the game. Even though most people will be able to run the game at 'minimum' to 'mainstream', the game does not look good until you have the 'gamer' options. The highest options are the 'enthusiast' which requires a powerful pc to run.
For example on the enthusiast settings I personally get around 25-30 fps on 1680x1050 with an Intel core 2 extreme @3.45ghz, 4 gig of ram and 2x 9600gt in SLI. Now I know my computer isn't the most powerful however it is only to show how much processing power is required to run the game.
All in all I believe the game should get a perfect score because it has improved on the faults which the original crysis suffered from, has additional content and is half the price of the original (also is a stand alone game) at $30.