Yes, addictive; but booring!!!!
I played Crysis, and after I played this, even the producers are fellow Turkish (not Turkish citizen, but Turkish); this is a much more boring game than Crysis. I installed the game, played and after some time, I never wanted to play this again!!! Why?
First of all, the missions lack of interesting things. It is like a normal FPS, just you find some gun, shoot at robotic creatures, or suited and non-suited Koreans, and sometimes you take a vehicle and drive it all over the place until it explodes. Vehicle is not an interesting thing, it was in the old Counter-Strike too!!!
It doesn't bring any new to the Crysis, not even in story, not even in graphics or varieties. Sometimes you hear that stunning and lonely NOMAD character in the original game is a bad and unskilled soldier, that dissappoints you.
-SPOILER-
You are being kidnapped by Koreans, being interrogated by a very very cliché general, you wake up in an ice field. Well, waking up in an ice field, and seeing everyone frozen might be interesting, but, hello??? We have seen this surprise in the original Crysis, and it was in a much more beautiful place, with a much more beautiful story.
-SPOILER ENDED-
Well, shortly, like Farcry 2, it lacks of story, and nothing original in this expansion. Expansions must be better for players to enjoy, but it is a lot worse! It is just an ordinary shooting experience with nice graphics and sounds. Even in your very first hours, you don't enjoy, after the aliens appeares, you enjoy a one hour or two; and it starts being boring again. Doesn't worth your money. Just buy the original Crysis, if you have one, buy Farcry 2, it is better!