Play as Fongling
Complete the game once, then start using the same save to play through the game as Fongling (Bruce's segment's become Fongling's).

Change Title Screen
Once you beat the game on any difficulty setting, the title screen will change from blue to red, indicating completion.

See Girly Poster
In Room 006 off of the Ship Crew Room on the B1F level, check out the last bunk on the right to see a girly poster.

New Starting Weapons
Finish with different rankings to unlock new sets of starting weapons:

Easy, "A" rank: All handguns and shotgun.
Easy, "S" rank: All weapons (except charged particle rifle).
Normal, "A" rank: All weapons (except charged particle rifle).
Normal, "S" rank: All weapons with unlimited ammo(except charged particle rifle).
Hard, "A" rank: All weapons with unlimited ammo(except charged particle rifle).
Hard, "S" rank: All weapons with unlimited ammo.

Play as Fongling:
Successfully complete the game. Start a new game from the cleared
game file to play as Fongling instead of Bruce in those areas.
Information in this section was contributed by W.McNight and mahmoud
gorbanzade.

Alternate title screen:
Successfully complete the game to change the colors in the title
screen.

Replay with more weapons:
Successfully complete the game with various ranks and difficulty
settings to unlock additional starting weapons.
Easy difficulty, "A" rank: All handguns and shotgun.
Easy difficulty, "S" rank: All weapons except charged particle
rifle.
Recommended difficulty, "A" rank: All weapons except charged
particle rifle.
Recommended difficulty, "S" rank: All weapons except charged
particle rifle with unlimited ammunition.
Extreme difficulty, "A" rank: All weapons except charged particle
rifle with unlimited ammunition.
Extreme difficulty, "S" rank: All weapons with unlimited
ammunition.

Pause game play:
To stop the game clock, enter the items screen.

Hint: Defeating Morpheus:
When Morpheus is not a giant slug, use your grenade launcher or C.P.
rifle. You must move constantly. Shoot him once or twice with one
and move. Zigzag between the poles and avoid Morpheus' quick hand.
If, however, Morpheus is able to hit you with his hand, after four
or five hits, he will do a backflip away. When he does this, run
immediately and heal with a Green Herb or other item.

Hint: Defeating giant Morpheus:
To kill Morpheus when he becomes a giant slug-type creature, keep
shooting at his eyes. Try to develop a rhythm of where his head
moves. As you hit his head, he will move backwards, allowing you to
defeat him

Hint: Defeating Bosses:
To easily kill Bosses or larger zombies, shoot them with the Magnum.

Hint: Defeating torpedo kids:
Killing the torpedo kids is very easy. Take out your shotgun and
shoot them. Although they are fast, all you have to do is shoot
within reason, about a centimeter or two off, as the shotgun shoots
out multiple shells at a time.

Hint: Defeating first non-zombies:
The first creatures resemble walking frogs. They are fast and can
jump. Try shooting them with a shotgun, then continue while they are
down. If you are out of shotgun shells, use the handgun and shoot
them once and run. Once they begin chasing you while you are using a
handgun, get a good distance and begin shooting them again. However,
run when they are about ten feet from you.

Hint: Assault rifle and shells:
Start the game under the easy difficulty setting. On the 2F, go into
the kitchen. There will be a door directly across from the entrance.
Go into it and enter the open room. There will be an assault rifle
with 100 shells and 100 extra shells next to it. This awakes the
zombies in the freezer. To kill them easier, go back into the
kitchen for a few seconds, re-enter, and get ready to fire.

Hint: C.P. rifle:
The C.P rifle is a gun that does not run on ammunition, but
batteries. It is located in the sewers. Go to where the plant and
laboratory is located. You can find it in the room that has
creatures locked in a chamber. It is in the chamber that is open.
Once you get it, the creatures in the other chamber are released.
Use a different gun to kill those zombies in order save your
batteries for Morpheus.

Hint: Handgun ammunition:
Ammunition for your handgun is located in the lounge and other
places where you save your game.

Hint: Keys:
The first key you need is located under the corpse in Room 101 2F.
Press X or Circle. After you go into the very next room, a female
zombie will come alive. This is the first zombie that you kill. This
key is to one of the big doors out in the main beginning hallway
when a new game is started. The second key is located in the VIP
Room 2F. This key unlocks two of a floor's electronic locks.

Hint: Easy handgun kills:
To kill the zombies or other creatures quicker with the hand gun,
take an extra moment and aim at their heads

Hint: Easy map access:
Press Select to get to your map without having to press Start and
searching. Pressing Select also gives you a better view of the map,
showing where you are, which rooms are locked, which rooms you can
go through, etc.

Hint: 180 degree turn:
Tap Down(2) to make a quick 180 degree turn. This is extremely
useful in certain circumstances.

Hint: Walk in first person (shoot mode):
Hold A or B in shoot mode and press Up or Down on the D-Pad at the
back of the gun to sneak. As usual, holding A allows you to sneak
with the same control system as if you were running. Holding B
allows you to sidestep instead of turning