Resident Evil Zero

When you get to the fountain circle with the six animal statues on Disc 1, use Billy to light the statues in the following order: Deer, Wolf, Horse, Lion, Snake, Eagle.

Successfully complete the Leech Hunter mini-game with one of the following ranks to unlock the corresponding bonus:

"A" rank: Infinite ammunition for any weapon
"B" rank: Magnum
"C" rank: Hunting Gun
"D" rank: Handgun
"E" rank: Submachine Gun

As soon as Leech Hunter starts, grab the first leech you see and run out. This will give you a clip to the machine gun.

When you are in the sewers, pick up the shotgun ammunition. Then, keep trying to pick up something and you will eventually find a shotgun.

When playing as either Rebecca or Billy and you get bit by a zombie, move the character opposite of your main character directly behind the one you are controlling to have him or her shoot the zombie in the head and kill it in one hit, while the zombie deals you no damage. Note: You must have pistol equipped to save ammunition for a one bullet kill.

Change to your partner during a timed puzzle. Remain idle at the error message to give yourself more time to study the puzzle.

When you get to the piano room, make sure you have both characters with you. Have Billy play piano. A door will open by the bar. Have Rebecca go in and take the battery. The door will close. Have Billy play piano again and the door will open.