Cool thread.
I would like to mention that Crysis + Crysis Warhead is on sale at steam for $ 6.59. Curiously it's even cheaper in some european countries, especially UK.
That's a great offer.
I bought them both at retail back in the day and had a ton of fun. I bought them again in this sale for the nostalgia and after an hour or so I would say that Crysis still holds up remarkably well. It's not perfect, but it is still absolutely enjoyable.