Alternative outfits:
Successfully complete the game under the normal or hard difficulty settings with any rank. Start a new game and a Closet Key will appear in your inventory. You can now unlock the closet in the room where the Hunting Gun was found to access new costumes for Rebecca and Billy.

Completion awards:
Unlock the listed awards by performing the corresponding tasks:

Leech Hunter mini-game – Successfully complete the game with a “B”, “C”, or “D” rank
Submachine Gun and Leech Hunter mini-game – Successfully complete the game with a time between 3:31 and 5:00 for an “A” rank
Rocket Launcher, Submachine gun, and Leech Hunter mini-game – Successfully complete the game with a time of 3:30 or faster for an “S” rank. Note: Only the Leech Hunter mini-game can be unlocked under the easy difficulty setting.

One shot kill:
When playing as either character and you get bit by a zombie, move the other character directly behind the one you are controlling to have him or her shoot the zombie in the head and kill it in one shot. Note: You must have a pistol equipped and ammo for a one bullet kill.

Easy zombie kill tip:
With the shotgun, always blow the zombie?s legs away to make it fall. Then take out the handgun and shoot him once more..

Extra inventory space:
When playing as Billy, hold all the pistol ammunition for both characters and keep her gun fully loaded. This allows you one free inventory slot.

Dial door number puzzle:
Where the cable car is located on Disc 2, enter “4863”.

Chess puzzle tip:
Look at the smaller chess board on the desk near big one and arrange the big pieces the same way. The only difference is the white piece by itself. Use Billy to push it down to the right, in front of the black piece. The desk will then open.

Brake system puzzle hint:
In order to start the train brakes, first find the Magnetic Keycard (lying on the train control panel in the front car) and choose a character to go through the train. Do not choose Rebecca because there are too many zombies for her to handle. It does not matter if you cleared all the zombies in the train since more will appear. Once you have reached the caboose, use a healing item if needed. Activate the control panel by using the Magnetic Keycard on the panel. The game will randomly choose one of three numbers to display. You must then figure out what ten numbers add up to the displayed number. Below are the three random numbers and their solutions:

36: 3 3 3 3 3 3 3 3 3 9
67: 9 9 9 9 9 9 9 9 9 4
81: 8 8 8 8 8 8 8 8 8 9

Now take control of Rebecca and she will do the same thing without the keycard. She also has a set of three random numbers to solve. However, unlike Billy, the current total won?t be displayed. Below are the second control panel’s three random numbers and their solutions:

42: 4 4 4 4 4 4 4 4 4 6
53: 5 5 5 5 5 5 5 5 5 8
67: 7 7 7 7 7 7 7 7 7 4

Fountain circle puzzle hint: ????
At 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.

Animal puzzle hint:
The solution for the animal puzzle is Deer, Wolf, Horse, Lion, Snake, Eagle.

Pause timed puzzles hint:
Try to change to your partner during a timed puzzle. Leave the error message idle to give yourself more time to study the puzzle.

Piano room hint:
Make sure you have both characters with you when entering the piano room. Have Billy play the piano and a door will open by the bar. Have Rebecca go in and take the battery. The door will then close. Have Billy play the piano again and the door will open.

More life as Billy:
It?s better to use Billy instead of Rebecca. He has stronger defense and will not get damaged as much as Rebecca.

Billy?s custom handgun:
In the draining room in the facility basement you will find the Duralumin case. You have to enter a code, which is 385. The case will open and you will find handgun parts which you can combine with Billy’s handgun for a more efficient handgun.

More shotgun ammo:
Once you get the shotgun, don?t use it. Instead, leave it in the room with the scale you put the two figures on. Find lots of shotgun ammunition but do not pick it up. After you save her from the pit, give all the hand gun ammo to Billy and collect the shotgun ammunition with Rebecca. She will have about 60 rounds, which is much better than using two hand guns.

Hunting gun hint:
Since Rebecca shoots faster than Billy, equip her with the hunting gun with unlimited ammunition from the Leech Hunter mini-game.

Quick shotgun reload:
To reload the shotgun quicker, press?Y?to go to the item screen and combine the shotgun ammunition with the shotgun. You will be able to attack again without having Billy or Rebecca reload.

Saving ammunition hints:
-Equip the handguns to both Rebecca and Billy and take control of Billy. When you see a zombie, shoot him until he falls but don?t kill him. Then, equip the knife and kill the zombie with it. This will save you a few bullets each time.

-There are two knife tactics you can use to conserve ammunition for the Bosses. The first tactic is to fight solo without the help of Billy or Rebecca; depending on whom you use. Make sure you keep about two steps of distance from the zombie and aim downward with your knife. Slice him once and avoid his attempt to lunge at you. Then, slice his feet again and he will fall down on the ground. Once down, do not knife him any more but instead take about a step backward and wait for him to get up. Repeat this process again. This tactic works if there are a bunch of zombies. Alternately, if there is only one zombie, move to behind the zombie’s head when he is laying down. Then knife his head and keep knifing him as he?s getting up. When done properly, you will knife his feet twice and he will fall down again. This will allow a few extra knife shots while he gets up. The second knife tactic is used fighting with both characters. The person you control should be using a knife while your AI partner should be using a gun (and set on attack mode). Get in front of the character with the gun and knife the zombie’s feet. As you knife the feet, your partner will shoot the head and the zombie will fall down. Go over and knife the zombie while he is on the ground. Keep knifing him and your partner’s help will assist you in finishing him off.

Save ammo on first Leech zombie on train:
After the sequence with the first Leech zombie, just go back downstairs and the cutscene will take place again.

Train wreck items:
In the train there are a bunch of items. If you have no use for them while on the train, select them but do not take them. When the train crashes, the items you selected will be scattered around the wreck while the items not selected will disappear. This is very important if playing under any difficult setting.

Leech Zombie hints:
-When you fight the Leech Zombie, its legs will swell up before dying and explode, hurting and sometimes killing you or your partner. There are three ways to avoid this. First, just get away as his legs are swelling but before he explodes. The second way is to use a Molotov cocktail on him, which will burn and melt him into a puddle of slime and leeches. The third way is to kill him while he is still in “human” form, which is best done with the magnum or any powerful weapon.

-Always pick up empty bottles you find and combine them with the gas can for the Molotov cocktails. Two of these will kill a Leech Zombie and it will not explode as usual. It will also kill a zombie with one hit or two zombies at once if you hit them both. Note: This weapon can harm you or your partner if thrown too close.

Resident Evil 2 areas:
When you? get on the moving cable car after Billy is taken over the railing by an ape, go across the ravine and head up the steps. You will enter a big room with a metal floor. This is the same area as in Resident Evil 2 where you call up the platform train to head down into the main factory and fight a stronger version of the William Birkin mutations. If you go towards the bottom of the screen and down the lift into the back room, you will find a television screen with a picture of a Tyrant. This is the same room where you see Mr. X walking towards the camera before smashing it. If you call up the platform and take it down, you will enter the factory sub-levels and walk into the room where Leon/Claire had to carry Ada/Sherry to the security room.

Hard mode tips:
Use the following tips to complete the game in hard mode:

-Always use Billy.. He can take much more damage than Rebecca.
-Leave Rebecca in the main hall. She just uses up ammunition and first aids. However, bring her the plants to mix for you.
-Use a custom handgun, or if you dare, a knife to kill the tyrant. It is easy to run circles around him and shoot him in the head, or use the knife. It may require about 30 shots with the custom handgun to kill one.
-Use the Magnum ammunition for the last Boss only.
-Do not use the Pump Action Shotgun. It is weak. The Hunting Gun does more damage. -Get it on the train and keep it.
-Use Herbs only if you are hurt really bad.
-Use Molotovs on the Leech Zombies.
-Use your Molotov Cocktails on the final Boss’ third form, Tyrant, or Leech Zombies.
-Sometimes you can run passed the hunters and out the room without wasting ammunition, such as when you get the up key. The same goes for the Leech People. They are too slow if you use one person to run past them.

Leech Hunter mini-game awards:
Unlock the listed ranks by performing the corresponding awards:

“A” rank: Unlimited ammunition for any weapon
“B” rank: Magnum
“C” rank: Hunting Gun
“D” rank: Handgun
“E” rank: Submachine Gun

Leech Hunter mini-game hints:
-During 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 can?t 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 so be careful.

-Zombies will start to come back to life once you get 95 leeches. Collect the leeches in the mail hall, dining room, and the second floor room where you use the MO disc last so you don?t get killed.

-In the far back of the kitchen are two leeches. a blue and green one. They are hard to see at first.

Extra Submachine gun ammo during Leech Hunter:
As soon as Leech Hunter begins, grab the first leech you see and run out. This will give you a full clip for the machine gun.

Finding the shotgun during Leech Hunter:
In the sewers, pick up the shotgun ammunition. Then, keep trying to pick up something and you?ll eventually find a shotgun.

Determining weapon during Leech Hunter:
There is a way to know if you will get the submachine gun or the magnum. Look at the two herbs in front of the stairs at the start of the mini-game. If the colors are blue and green, you will get the magnum while if the colors are green and green, you will get the submachine gun. The submachine gun is powerful and requires a lot less ammunition so green and green is highly recommended.

Resident Evil Outbreak easter egg:
The area where the turntable is located is also in Resident Evil Outbreak. The turntable, elevator, door that has the main shaft on the wall, and security room are on the Below Freezing Point level in Resident Evil Outbreak. The giant hanger where you defeat the G-Monster on Resident Evil Outbreak is also located in Resident Evil 0.