I own all the Crysis games and finished them all.
I have to say my favourite is the original Crysis and Warhead.
I found the aliens more challenging and the story was more compelling, making you want to play on to see what happens next.
After finishing Crysis and Warhead I was happy I finished but at the same time I was sad it was done, Crysis 2 didn't have the same reaction, it just made me more confused about where does everything fit in?
I spent couple of hours trying to find out did Alcatraz die and Prophet reborn, did the suit change Alcatraz into Prophet. Why are all the aliens so different, what happened between 1 and 2...etc
Hoping they make a add on to the game like warhead, maybe showing what happened between Crysis 1 and 2 as well as I hope they find a way to merge the stories and explain the differences between the 2 in the following sequels.
As I see it if they really wanted to change so much they might as well have changed the name of the game.

Crysis 2, good game none the less just not Crysis 1 and not Crysis Warhead.

Crysis 1is better crysis 2 multiplayer is just unplayable the campaign was alrite but multi is just the worst im rank 50 in ps3 world leaderboards and i am pretty good but when i try the gauss rifle i do so bad because i shoot they dont die and i try to shoot again with guass rifle and it takes a long time to shoot again and when i finally aim again he kills me so yea i think i will be selling this game since its a complete fail for snipers

It's not an easy thing to answer. I liked the story of Crysis 1 better as well as the alien designs and their deal with absorbing energy from everything.

On the other hand, the experience of playing the Crysis 2 campaign was a much more enjoyable one than playing Crysis 1. If only Crysis 2 had better vehicle usage and they didn't change stories. So I have to give a slight advantage to Crysis 2 from where I am standing.

Call of Duty 4

I liked everything better in Crysis 1, especially the story and aliens.

I liked everything better in Crysis 1, especially the story and aliens.
Same. Nanosuit is better. Enemies are better. Story, controls, action, graphics, characters (Where are Nomad and Psycho in C2? They're awesome!), weapons are better... simply:
Crysis 1 is not a sh***y console port.

Call of Duty 4
Yup. I prefer COD4 over the Crysis 2 COD4 multiplayer rip-off.

Crysis 4

Warhead.
I did like crysis 1, But being British, playing as Psycho felt much more bad ass than the typical USA MEGA SUPER HERO DUDE!!!

im rank 50 in ps3 world leaderboards and i am pretty good

Dude you told everyone you were boosting in another thread so please don't brag about your leaderboard status.

Warhead/Wars/Sandbox2.2/Autodownloader wins hands down, best game pack ever!
It even beats Orange box<

I liked Crysis 1 and loved Warhead, but Crysis 2 wins for me, especially with multiplayer.

WARS > CRYSIS > NANOCOD