Here are some cheats and tips for the game House of the Dead.
Display Score
To display the score, hold L+R while playing then press X three times.
Secret Characters
To use Sophie and one of the female researchers, hold the L and R buttons
at the character select screen in the Saturn Mode, and press
UP, DOWN, X, Y, Z. You will know the code was entered right if you hear a sound.
Unlimited Ammunition
While playing, hold L+R and press Y,Y,Y to eliminate the need to reload.