Actually chapter 4 was the hardest for me too, for some crazy reason.
Check my sig , my plat is for uncharted :D
Good luck.

TIP: Stay in cover and let the enemies run at you, then without popping out of cover, blindfire (Shoot without aiming). Get the shotgun and blow everyone up ;)

There be Spoilers below

Anyhoo :p any tips for chapter 4? I've found the mid section of the plane killed the first wave of Mercs and examined the plane, when I try to come down from it I get ambushed by 10 more and killed straight away. EDIT: I don't have the shotgun x_x unless I use the cheats, I only have the AK47 and a pistol (can't remember the name.

I beat Uncharted 100% without using any cheats. The chapter 4 and the last chapter are the only chapters who are really really hard.

Oh and i also got 61/60 treasures

when you come out of the plane they start pouring out from where you came from. Toss a grenade and take cover in the opposing end.

Once you kill those pirates they blow the door behind you off and start pouring in from there...so run to where the first group of pirates came from and you should be safe.

BTW where'd you get your platinum?

if you can make your way to were they come down from only 2 will jump out at a time and you can just punch them. my hardest part was the water one where you need to raise the water level to get out

Done it!! :D I finished with 1 pistol bullet left :D
My platinum is in fallout but I'm now being held up in the next area with the grenade launcher guy x_x but this one seems easier on paper.

I got to the final level, had problems with the end-game boss, gave up, watch the ending on YouTube and traded the game in.

Treat the combat like Gears of War, and use cover a LOT.

Never played Gears :D but yeah, cover is key...until you get to chapter 16 then all of that goes out of the window ¬_¬

Did you try blind firing?

I still haven't gotten a chance to play Uncharted.... only that amazing demo....