Hardest Chapters in Uncharted 2: Among Thieves

Mainly because the npcs could get in your way a lot. I'd recommend using the crossbow if you can as they are one shot kills (mostly)

First major encounter with the guardians

Makes Locomotion seem like a cake walk in comparison

You really gotta know the enemy spawn locations for this one.

Stealth is extremely useful here. The trickiest part is when the helicopter shows up

Gets a little easier once Chloe shows up but still frustrating if you aren't prepared enough

The open shoot out with the turret gun can be a pain, with all the SAS 12 guys as well

Another tough chapter with lots of shoot outs