Tomb Raider: The Last Revelation

Level skip
Lara must be facing exactly North according to her compass, then enter the inventory screen. Highlight the "Load Game" selection, press L1, L2, R1, R2, Up, then exit the inventory screen.

All weapons, infinite ammo, medipacks
Lara must be facing exactly North according to her compass, then enter the inventory screen. Highlight the "Small Medipack" selection, press L1, L2, R1, R2, Up, then exit the inventory screen.

All items
Lara must be facing exactly North according to her compass, then enter the inventory screen. Highlight the "Large Medipack" selection, press L1, L2, R1, R2, Down, then exit the inventory screen.