i found crysis not to be that linear really useless
It was massively linear! OK, you had a choice of three different hills to go over to reach the next objective, but that's still linearity. The game was the same each time it was played, the only variety came from how you approached each battle.
There's nothing wrong with this, I just hope Crysis 2 is a bit more open. Getting it anyway, Crysis was great fun.