Lara will perform any of the following actions during the game. Hold Walk and side-step left, side-step right, side-step left, step back, stepforward, spin three times in a complete circle in any direction, Finally, jump backwards and turn around in mid-air by pressing Down + Square, Circle (assuming the default controller configuration). The sound of Lara holstering her guns during the back flip will confirm correct code entry.

Level Skip

Hold Walk and side-step left, side-step right, side-step left, step back one step,step forward one step, spin three times in a complete circle in any direction, Finally, jump forwards and turn around in mid-air by pressing Up + Square, Circle (assuming the default controller configuration). Lara will freeze in mid-air to confirm correct code entry.

To sidestep, hold R2 and press the D-Pad in the indicated direction. To walk, hold R1 and press the D-pad in the indicated direction. Both R1 and R2 should be released when spinning or jumping.)

To walk, hold R1 and press the D-pad in the indicated direction. Both R1 and R2 should be released when spinning or jumping.)

Exploding Lara:

Walk one step forward, one step backward, hold Walk while spinning three times in a complete circle in any direction, and jump backward. Also reported as: In game play hold walk and step left, right,left, forward,backward and then turn around 3 times in any direction and jump forward and do a roll in midair. To do a roll in midar jump forward and while in air hit o.

Unlimited Flares:

Press L2 four times during game play. Although the flares will not appear in inventory, they may be used by pressing Triangle, L2 during game play.Note:This code assumes that the buttons have been left in their default configuration.

Easy Venice Exit:

Press X after pulling the switch (before the clock starts) to give Lara'sboat extra power. This will allow it to travel up the long ramp that leads to some windows. Lara will crash through the windows and land in the canal just before the exit with plenty of time to spare.

Another Easy Venice Exit

When you need to get to the exit,all you need to do is: push the switch that opens the exit door.Then,go under the door that you came in to gain acccess to the exit door switch. Next,swim to the exit door. Poof,now your done with the level! 
Note:You don't have to swim all the way to the exit door without taking a breath or two.
This Cheat/Hint submitted by Ant on Friday, March 5, 1999 at 15:59:00

Walk on the outside wall!

First you have to go to Lara's house then go to her training course. Go to the place where the wire zip is where you hold on and slide down but don't, walk to the pillar on the right slightly turn to the right then jump 2 times you will find yourself on the top of the pillar from there you can jump on the wall around her house!  

This Cheat/Hint submitted by cool on Thursday, February 25, 1999 at 09:06:47