Of all FPS, this definitively goes in my top 10 best FPS I have ever played. I don't know where to start well, let's see: Great graphics, great gameplay, great design of costumes, characters, weapons, vehicles and aliens.
Well designed and fun to play, Crysis is first and foremost focused on its graphics and visuals and they are truly something to behold. If you have a pc capable of handling it, max settings will still make your jaw drop all these years later.
As a preamble to this review, I have to say that this game looks a whole lot better in retrospect now, since I've played its sequel in the meantime. Maybe I'm just not a huge first person shooter fan or something (hence the lower score), but since that might be the case, my score is actually a compliment on the game.