Weapon Select
To select the weapon you would like to use, pause the game. Then shoot off-screen or press C button. Cycle through the weapons. (Note: the cheat menu must be activated.)

Weapon Type Shots Reload
Automatic single-shot 15 Yes
Machine gun continuous burst 30 No
Magnum single-shot ? ?
Revolver single shot 6 Yes
Rifle single-shot 24 NO
Shotgun three-shot burst 6 Yes
The Special single-shot -- unlimited

View Ending
On the first stage, after the last enemy has appeared and before the boss appears hold B + X + Z on Controller Two. Keep them down untill you beat the boss. You'll see the ending after the boss dies.

Rifle on Expert Level
When you first go down into the basement, shoot at the red barrel next to the truck and a rifle should appear.

More Time for Name Entry
To gain more time on the name entry screen shoot the backspace button 20 times and your time will refresh to 99 seconds.

Machine Gun at Expert Level
In the expert level, just before you enter the room where you get the rifle you'll see two paintings. Shoot them both until they're gone. You'll find a machine gun behind each of them