Extra Options in Boss Mode:-  Defeat and obtain a ranking for all bosses in Boss mode. Emperor and Fight All Bosses options will now be unlocked. 

Bonus Room:  To access the bonus room complete the game without losing any hostages. 

Follow the Kitty:  Shoot a cat and it will lead you to one of the Bonus Rooms. 

What's the score?   On the Title Screen, use the D-pad and press: L,L,R,R,R,L,R,Start. 

Unlimited Credits in Original Mode -  Complete Boss Mode with five-star scores for each boss - including Fight All Bosses

Extra Room: Complete the game with no hostage deaths and a hidden room will be available.

Fight All Bosses and Emperor Options:  Beat and get a ranking for all bosses.  NOTE: Works in Boss Mode Only!

Unlimited continues (japanese version):  Beat the game in training and boss modes.

Bonus room (japanese version):  Beat the game without losing any hostages.

Training mode and boss mode (japanese version):  Beat the game in original mode to unlock training and boss modes.

All Items (japanese version):  To have all items in the original mode, beat the training mode with 5 red star difficulty on each training stage.

Display Score (japanese version):  On the title screen press Left, Left, Right, Right, Right, Left, Right, Start.

Blood mode:  Beat original mode to unlock a blood color option

Emperor and Fight All Bosses:  Beat all bosses in the boss mode, then the two blanks will reveal Emperor and Fight all bosses options.

Napalm gun:  Kill the first three zombies in level 1 with perfect head shots.

Unlimited super ammunition:  Beat training mode with a five red star rating on each stage.

Faster Firing:  Press A + B together for faster firing action

Get Goldman Costume:  After finishing the game in original mode the next time you play the costume will be in the trunk of the car in the next original mode game.

Get Death Bullet:  All you need is 2.0 bullet. There is one door behind fish attacking at third chapter, if you shoot the door with 2.0 bullet, you'll get the Death Bullet!

Bonus Cats & Mice:  If you shoot the cats and mice that appear on the screen, they will lead you to bonus places!

All options:  On the title screen press L, L, L, R, R, R, L, R, R, L, L, L, R, R, L, L, R, R, R, L, R, R, L, L, R and start

Free Play (US version):  To access the Free Play in the Options menu, beat the Boss mode with all stars. Free Play will be available in the continuing settings.

Unlimited continues in Original mode:  Successfully complete Training mode with all five red stars; then, successfully complete Boss mode with all five red stars; and finally, get two stars in Fight All Bosses mode. The "Continue" option may now be changed to "Free Play." (Note: In the Japanese version of the game, you only need to successfully complete the game in Training and Boss modes.)

Hints:  Sometimes not saving civilians leads to more interesting routes.

As with most gun games, the actual enemy waves don't really vary here, so memorizing the lay of the game is the key to success.

Shoot all barrels, vases, and crates you see; they'll often reveal valuable rewards.

When playing with a friend, it generally helps if each player takes one side of the screen until it comes time to fight bosses. That way, you cover all ground.

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

Original Sin level items:  Begin game play in the "Sin" level in original mode. 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.

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.

First level items:  Get to the point in the first level in original mode, where the boy runs out the door with the Johnny's chasing him. After that, there are David's 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).

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.

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.

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.

Secret Passage:  At the beginning of chapter 2 when the car drives in, do not shoot at it and when it crashes it will reveal a secret path.

Gameshark Codes

99 Shotgun In Trunk - Original Mode 75459CFA00000063 
99 Machine Gun In Trunk - Original Mode 928C450F00000063 
99 Grenade In Trunk - Original Mode AC9B1E6900000063 
99 Power Up 2.0 In Trunk - Original Mode ECB3576C00000063 
99 Power Up 1.5 In Trunk - Original Mode CD2BA80000000063 
99 Power Up 1.2 In Trunk - Original Mode CD37A80000000063 
99 Bullet Blow In Trunk - Original Mode FC51D97E00000063 
99 Chamber +2 In Trunk - Original Mode 2C1B2CBD00000063 
99 Chamber +4 In Trunk - Original Mode FC69D97E00000063 
99 Chamber +8 In Trunk - Original Mode 2C232CBD00000063 
99 Chamber +Inf. In Trunk - Original Mode 33B96BBF00000063 
99 Cust. Air Gun In Trunk - Original Mode 5A6B38AF00000063 
99 Toy Gun In Trunk - Original Mode 5A7738AF00000063 
99 Bass Lure In Trunk - Original Mode 75719CFA00000063 
99 Life +2 In Trunk - Original Mode 87ABC2F800000063 
99 Life +5 In Trunk - Original Mode ACAF1E6900000063 
99 Credit +2 In Trunk - Original Mode 6F7B24B900000063
99 Credit +5 In Trunk - Original Mode 8657C2F800000063 
99 Credit +10 In Trunk - Original Mode 9340450F00000063 
99 Credit Inf. In Trunk - Original Mode BDCA757500000063 
99 Primitive Meat In Trunk - Original Mode BDD6757500000063 
99 Rotten Meat In Trunk - Original Mode D35CCC2700000063 
99 Amy Costume In Trunk - Original Mode ED7F576C00000063 
99 Harry Costume In Trunk - Original Mode 1B98596900000063 
99 Goldman Costume In Trunk - Original Mode ED47576C00000063 
99 G Costume In Trunk - Original Mode 1BA0596900000063 
99 Rogan Costume In Trunk - Original Mode 2DEF2CBD00000063 
99 Bruno Costume In Trunk - Original Mode 4366503100000063 
99 Civilian Costume In Trunk - Original Mode 437A503100000063 
99 Life 1/4 In Trunk - Original Mode 6F4F24B900000063 
99 First Aid Kit In Trunk - Original Mode 74BD9CFA00000063 
99 UFO?? In Trunk - Original Mode 9374450F00000063 
99 Double Score In Trunk - Original Mode 8613C2F800000063 
Infinite Everything In Trunk - Original Mode 75449CFAE06F5041  24943CAD8613C2F8  0000006300000000 
P1 Max Score A5039E770098967F 
P2 Max Score BED6F56B0098967F 
P1 1 Hit Kills CDA3E8000000BF80 
P2 1 Hit Kills 1A2C19690000BF80 
P1 Infinite Ammo Clip Active 75CD9CFA000000FF 
P2 Infinite Ammo Clip Active ACC31E69000000FF 
P1 Play as Amy D260CC2700000002 
P2 Play As Amy 5AFF38AF00000002 
P1 Play As Harry D260CC2700000003 
P2 Play As Harry 5AFF38AF00000003 
P1 Play As Goldman D260CC2700000004 
P2 Play As Goldman 5AFF38AF00000004 
P1 Play As G D260CC2700000005 
P2 Play As G 5AFF38AF00000005 
P1 Play As Rogan D260CC2700000006 
P2 Play As Rogan 5AFF38AF00000006 
P1 Play As Bruno D260CC2700000007 
P2 Play As Bruno 5AFF38AF00000007 
P1 Play As Civilian D260CC2700000008 
P2 Play As Civilian 5AFF38AF00000008 
Infinite Credits 3BA12BA200000009
Infinite Health P1 4B72102F00000003
Never Reload P1 B556356B00000006
Infinite Health P2 A9AB5E7700000003
Never Reload P2 D0188C3900000006