Original URL: http://www.psxextreme.com/psp-cheat-print/21.html
Death Jr.

Cheat: Codes

The following codes must be entered while the game is paused. You also must hold the PSP's L and R buttons while entering the code.

Invincibility
UP, UP, DOWN, DOWN, LEFT, LEFT, RIGHT, RIGHT, SQUARE, TRIANGLE

All Upgrades
DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE

All Weapons

UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE

Portable Ammo Dump
TRIANGLE, TRIANGLE, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE, DOWN, RIGHT