Collect all 30 artifacts in the game to unlock an art gallery.
Press Square to break boxes then press Triangle to pick up the item. Note: Note all boxes contain items.
When you're falling, enter Combat Mode right before you hit and you'll incur no damage.
Press Square to pistol whip your adversary. Note: This works for all guns, not just the pistols.
To drink from the canteen, hold X. If you instead tap X, it will take longer. Holding X also helps when you fill your canteen.
Equip the PaCheng and press R1 to block.
When you reach Istanbul Sunken City, to break the damaged wall, hover above the head in the water with the crane. Press X and it will automatically break it up.
Submitted by: Adolfo
On the first level when you first encounter crocodiles, kill all of them with your machete. Then, swim to the left next to the entrance to the temple. Swim behind the waterfall to pull up on a small ledge. You will not be able to see much, there is a box here. Break it open to get a bundle of dynamite.
When you are falling from heights that will hurt or even kill you, press R1 just before you land. You will enter the combat stance and will lose hardly any life or maybe even none at all.