I have no idea, but I think the playtime has been killed incredibility on Warhead compared to the first Crysis?
But I obviously may be missing out. All I noticed is that Psycho hates Nomad. But what was the point of Warhead?
I didn't really pay attention to the story line that much.
I'm at University, and my computer isn't with me so don't tell me to re-play it because I won't be able to for two weeks.