Lara’s Moves:

Handstand

Press and hold L1, L2, R1, R2 when Lara is hanging from a ledge.

Somersault

Press TRIANGLE then UP (Analog Stick) when facing a ledge.

Backflip

Hold L1 and X while backed against a wall and then press AWAY (Analog Stick).

Swan Dive

Hold L1 and Up (Analog Stick) and then press CIRCLE.

180 Degree Turn and Crawl

Hold L2 for Lara to stay on all fours, then press SQUARE.

Cheats/Hints:

Skip Level

At the Pause menu (Press Start during gameplay), hold L1, R2, DOWN, TRIANGLE. Then press CIRCLE, UP, SQUARE, TRIANGLE, RIGHT, DOWN.

Infinite Air

While swimming, save the game and then load. Your oxygen gauge will be restored.

Von Croix Shotgun

Before leaving the stage Galleries Under Siege, equip your shotgun and clear the area.
When Lara investigates Von Criox's apartment again, press UP (D-pad) and the shotgun will be available.

Unlimited Items

When Lara enters and re-enters a room, the items will continually appear