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Dreamcast - Tomb Raider: The Last Revelation cheats

Jump to next level:
Check the compass and turn Lara face exactly north. Enter to the inventory.
Hold L + R and press Y then leave the inventory screen.
Note: Have hang from north-facing object to face North easily.

All weapons, infinite ammunition, and infinite medipacks availabale:
Check the compass and turn Lara face exactly north. Enter to the inventory 
and highlight the "Small Medipack", after press L, Up, X, Up, R, Y. 
Note: Have hang from north-facing object to face North easily.

Unlimited Lasersight ammunition:
Equip your revorvel or crossbow with the Laser-sight. 
Zoom in, hold L then push Start. Keep held L, choose the pistols and press A. 
While still holding L, exit the pause screen. You will hear the sound of gun.
Repeat as many times you want.