Collect all artifacts in the game to unlock an art gallery.
Press R1 before you hit the ground to enter combat mode. You will not get any damage from falling.
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.
Press Square to break boxes, then press Triangle to pick up the item. Note: Note all boxes contain items.
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.