Red blood:
Successfully complete the game in original mode. A selection for blood color will
appear on the options screen. 

Goldman costume:
Successfully complete the game in original mode. The Goldman costume will appear
in the trunk of the car in the next original mode game. 

Rogan costume:
Begin game play in original mode and select the 2.0 Bullets and the Double Score
items from the trunk. Rescue all civilians except for the second person on level 4.
Complete the game and enter the bonus room at the end. A Rogan Costume and an
Infinite Credits item will be in the room. 

Bruno costume:
Accumulate over 70,000 points and play on the "Sin" level in original mode. You can
get the Bruno costume when a maid comes out of a secret room, hands it to you, and
wishes you good luck. Note: It is a good idea to have the Double power-up when you
are attempting to get the costume.

Extra options in boss mode:
Successfully defeat and obtain a high score ranking for all bosses in boss mode.
"Emperor" and "Fight All Bosses" options will now be unlocked. 

Napalm gun:
Kill the first three zombies in level 1 in original mode with perfect head shots. If done
correctly, the napalm gun will appear on the ground. 

Unlimited death bullets:
Successfully complete training mode with five red stars in each sections. This will
unlock the unlimited chamber item in the trunk in original mode that kills with one hit. 

Unlimited continues in original mode:
Successfully complete training mode and boss mode with five red stars in each
section. Finally, get at least two stars in the fight all section. A continue infinity item will
appear in the trunk in original mode. Note: In the Japanese version of the game,
successfully complete the game in training and boss modes. 

Go to the fifth chapter in original mode to the section with the second battle the Boss
that has the heart that opens and closes. Immediately following that segment, you will
drive up to two vans with four zombies. Shoot the back door of the van on the left, then
kill the zombies. Then the van on the right will open. Kill those zombies. When you turn
back towards the van on the left again, shoot the coin with the infinity symbol to get
unlimited continues. The coin will only appear if you have over 100,000 points. Using a
double score bonus while playing is recommended. 

You can also get the unlimited continues coin in the Sin level in original mode. If you
have over 100,000 points by the time you get to the Emperor, a secret room will open
and a infinite credit item will be inside. 

Play as Gary:
Use a controller in port B to play as Gary instead of James in single player mode. 

Hint: Original Sin level items:
Begin game play in the "Sin" level in original mode with over 70,000 points. Start
aiming for the lower right corner just before entering the elevator. There is a bullet
power-up or a death bullet power-up at that location. The bullets kill any zombie with
one hit anywhere on the body.

Hint: Muddy level items:
Begin game play in the "Muddy" level in original mode. Save the fat man that is under
attack that comes into view right after turning a corner. He will give you a +10 credit.
Note: This is same the man that says "What is this city coming to?" when the game is
played in arcade mode.

Hint: First level items:
Get to the point in the first level in original mode, where the boy runs out the door with
the Johnnys chasing him. After that, there are Davids that jump down from the bridge.
Use a grenade (only) to blow open the door behind the David to the left. A
grandmother will come out and give you a Bullet Blow, Grenade and other items
(depending on how many times original mode has been completed). 

Hint: Advance to Magician:
Play to the point in the "Muddy" level in original mode where the key is laying next to
the dead man. Shoot the key, and get to the point where the boy asks you to save his
father. Do not open the lock to proceed through the other door on the opposite side.
Shoot the black phone on the couch to advance directly to the Magician.

Hint: Extra items:
Start a game in original mode with 1.2 bullets and play to point the "Muddy" level
where zombies climbing the blue van are encountered. After walking up the stairs, a
zombie jumps down from atop the buildings. Then, two other zombies that throw
knives will appear. There is a door directly behind them. Shoot it until it opens. A man
will give you a many different items each time that it is opened. 

Hint: Bonus room:
Successfully complete the game in original mode without losing any civilians and with
a score of at least 1000,000 points to reach a bonus room full of items at the end of
the game.

Hint: Goldman zombie:
Enable the "Infinite credits" bonus. Play through the game and shoot every hostage
and try to get the lowest score possible. Towards the end of the game, when the last
door is opened, Goldman will appear like a zombie.

Score display (Japanese version):
Press Left(2), Right(3), Left, Right, Start on a standard controller or light gun D-pad
at the title screen. A "0" score will appear at the top of the screen to confirm correct
code entry. 

All items in original mode (Japanese version): 
Successfully complete all training mode sections with five red stars to receive all items
in original mode. Note: This may also be done by successfully completing boss mode
with five red stars in each section. 

Training mode and boss mode (Japanese version): 
Successfully complete the game in original mode to unlock training and boss modes.