Tomb Raider: Legend Hints

Having trouble with time trials? Try completing the final time trial in Bolivia
against the final boss first (it's a boss fight, and it's easy). This unlocks
the one-hit death cheat. You can input the cheat when the cinematics are playing
at the beginning of a stage and make enemies and certain bosses die quickly,
saving you some much needed time. It also makes the motorbike races faster to
finish. Note that only one cheat may be turned on at a time.