Well, at least most of Crysis is a lot of fun. The end bits are really bad. Like, they get close to CoD4 single player bad. 70% or so of the game is amazing because it is totally non linear to how you approach each situation. The alien ship parts aren't terrible and zero g is cool at first, but the real fun is everything before that section. Multiplayer is also pretty decent. It is like a poor mans Battlefield, but a better poor mans battlefield than Battlefield 2142, Bad Company, and maybe on part with Quake Wars.
The fact that the game looks amazing, but doesn't look like a shiny over saturated bloom filled piece of shit, is still really worth noting. It is such a pretty looking game, but it is even more amazing that it isn't just a scripted path made to look nice, everything looks nice and you can fly around and it is consistent the entire time.