Tomb Raider 3 Cheats

All weapons, medkits, flares and save crystals:
Rapidly push L2, R2(2), L2(4), R2, L2, R2(2), L2, R2(2), L2(2), R2, L2(2), R2 while playing the game. You will hear LARA scream if you have entered the code correctly
User Cheat by SamuraiKid

Level skip:
Rapidly push L2, R2, L2(2), R2, L2, R2, L2, R2, L2(4), R2, L2, R2(4), L2 while playing the game. Lara will say "No" to confirm correct code entry.

All secrets:
Rapidly push L2(5), R2, L2(3), R2, L2, R2, L2(2), R2, L2(2), R2, L2(2) while playing the game. Lara will say "No" to confirm correct code entry. Enabling this code will also unlock the "All Hallowed" bonus level.

Racetrack key in Lara's mansion:
Rapidly push R2, L2(3), R2, L2(6), R2, L2(5), R2, L2(2) while playing the game.

Full health:
Rapidly push R2(2), L2, R2, L2(6), R2, L2(3), R2, L2(5) while playing the game.

Use three weapons simultaneously:
Rapidly push L2(2), R2(2), R1, L1, R2, L1(3), L2(3), L1, R1(3), R2 while playing the game.

Flip in the air:
Instead of jumping forward or backward and pressing Roll immediately, press the opposite direction. For example, if you jump forward, immediately press Down and Lara will do a flip in the air. Do the opposite if you jump backwards.

Dive into water:
Hold R1 and jump forward.

Monkey sighting:
Go down the slide in the first level, and jump when you see a log. You will be able to see a monkey on the log.

All Hallowed bonus level:
Complete the normal levels and unlock all the secrets. The "All secrets" code may be used to do this instantly. The "All Hallows" level will appear at the "Load Game" screen. It is an extra London level.