Successfully complete the game with any rank on the normal or hard difficulty settings. Start a new game. A Closet Key will appear in your inventory. Use it to unlock the closet in the room where the Hunting Gun was first found to access new costumes for Rebecca and Billy.
Better shotgun use
Once you get the shotgun, do not use it. Instead, leave it in the room with the scale you put the two figures on. Find, but do not pick up, lots of shotgun ammunition. After you save her from the pit, give all the hand gun ammunition to Billy and collect the shotgun ammunition. If you get it all, she will have about 60 rounds, which is much better than using two hand guns.
Brake system puzzle
The main code is 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 7 + 2 = 81. This should activate the brakes for the train.
Collecting Leeches in Leech Hunter mini-game
While playing the Leech Hunter mini-game, kill everything in the Mansion, Train Tunnel, and Basement before picking up any of the leeches. Once you pick one up, you cannot put it down. Each player can find a maximum number of 50 leeches (100 total leaches in the game). One item slot can only hold 10 leeches only -- be careful.
Completion bonuses
Successfully complete the game with a "B", "C", or "D" rank to unlock the Leech Hunter mini-game. Successfully complete the game with a time between 3:31 and 5:00 for an "A" rank to unlock the Submachine Gun and Leech Hunter mini-game. Successfully complete the game with a time of 3:30 or faster for an "S" rank to unlock the Rocket Launcher, Submachine gun, and Leech Hunter mini-game. Note: To get a rank after completing the game it must be played on the normal difficulty setting. You will not get ranked on the easy difficulty setting, but can still unlock the Leech Hunter mini-game.
Dail door number puzzle
Enter "4863" on Disc 2, where the cable car is located.
Determining weapon in Leech Hunter mini-game
There is a way to determine if you will get the submachine gun or the magnum. Look at the two herbs in front of the stairs in front of you at the start of the mini-game. If the colors are blue and green, you will get the magnum. If the colors are green and green, you will get the submachine gun. The submachine gun can do what the magnum can and requires a lot less ammunition. Green and green is highly recommended. If you want the magnum on the Leech Hunter mini-game, load your game on Disc 1 (only if you have passed the game once and have unlocked the Leech Hunter mini-game), then play the mini-game. You will see a Green Herb and a Blue Herb, indicating that the Magnum is there. If you want the Submachine gun, load your saved file with mini-game on Disc 2 and play the mini-game. You will see two Green Herbs, indicating that the Submachine gun is in the game.
Easy Leech Zombie Kill
Just run into the room where the leech zombie is (just go billy and leave rebecca outside) and once you get in blast it twice with the shotgun and once it transforms run round it, fire, run around it again, fire etc.
Easy Scorpion Kill
Once you come up against the Scorpion boss and you have the Hunting Rifle just wait until it runs to you and aim down and shoot it (repeat this strategy until necessary).
Extra inventory slot
When playing as Billy with Rebecca as the alternate character, have Billy hold all the pistol ammunition for both characters and keep her gun fully loaded. This gives you one free inventory slot.
Fountain circle puzzle
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.
Leech Hunter mini-game bonuses
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
Leech Hunter: Collecting Leeches
While playing the Leech Hunter mini-game, kill everything in the Mansion, Train Tunnel, and Basement before picking up any of the leeches. Once you pick one up, you cannot put it down. Each player can find a maximum number of 50 leeches (100 total leaches in the game). One item slot can only hold 10 leeches only -- be careful.
Once you get 95 leeches, zombies will start to come back to life. Collect the leeches in the mail hall, dining room, and the second floor room where you use the MO disc last so you do not get killed.
An easy way to complete Leech Hunter mode is to go through and kill all the enemies first, then return and collect the leeches. Note: Collect the leeches in the Basement area first to avoid the risk of revived Zombies.
In the far back of the kitchen are two leeches (a blue and green one). They are difficult to see at first.
Leech Hunter: Determining weapon
There is a way to determine if you will get the submachine gun or the magnum. Look at the two herbs in front of the stairs in front of you at the start of the mini-game. If the colors are blue and green, you will get the magnum. If the colors are green and green, you will get the submachine gun. The submachine gun can do what the magnum can and requires a lot less ammunition. Green and green is highly recommended.
If you want the magnum on the Leech Hunter mini-game, load your game on Disc 1 (only if you have passed the game once and have unlocked the Leech Hunter mini-game), then play the mini-game. You will see a Green Herb and a Blue Herb, indicating that the Magnum is there. If you want the Submachine gun, load your saved file with mini-game on Disc 2 and play the mini-game. You will see two Green Herbs, indicating that the Submachine gun is in the game.
Leech Hunter: Extra Submachine gun ammunition
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.
Leech Hunter: Finding the shotgun
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.
One hit kills
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.
Pause timed puzzles
Change to your partner during a timed puzzle. Remain idle at the error message to give yourself more time to study the puzzle.
Piano room
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.