Tomb Raider Starring Lara Croft: The Trilogy Cheats

When playing a level, pull out a flare, then do the following: Step forward, step backward, three complete turns and do a back flip. You will then get all the weapons.

At any time during a level, do the following: Step forward, step backward, three complete turns and do a forward jump. You will then be taken to the beginning of the next level.