Beat all the normal scenarios (LeonA/B,ClaireA/B) to unlock the Randomizer Option.If start a new game at the Start Game Screen you will be able to choose between Normal and the Randomizer Option.It will place most of the items in the game randomly.This way you will surely be able to gain much more Ammo as in Normal Mode.

To get new costumes in the game,start a new game with either character on Normal.
Do not pick anything up.

When you get to the police station you will see some stairs. Go down the stairs and there will be a zombie.

Kill him and he'll drop a ''Special Key''.

Use the key in the lockers in the dark room and there will be a screen that comes up that asks you if you want to switch costumes.

Say yes and you will have the ''new costumes''

How to unlock Hunk.

Finish the game, save it when prompted, and the weapons will appear when the first chest is opened.

Finish Leon(or Claires) A game and Claire (or Leons) B Game 3 times (which would mean beating the game 6 times) During the first two runs you must obtain the Hunk Mission by recieving an A rank on both games.

To view a secret film, search the desk to the far left of the S.T.A.R.S. office 50 times. On the 50th time, you'll find a roll of film which you can develope in the darkroom.

If you shoot at the screen with your pistol in some places, you will see bulletholes appear momentarily on the screen.

Before you use the custom parts on the VP70(Handgun), Desert Eagle(Magnum) or Shotgun use the remaing ammo in the clip/breech. When you use the custom parts to upgrade the gun it will automatically be fully loaded. This may seem like a small amount of ammo but can go a long way in the harder difficuties were ammo is rarer.

To do this, go to the outside area in the basement where two dogs jump down from the fence. Quickly stand with your back facing the manhole and walk forward until the camera angle changes. Now draw your weapon and shoot. Then, bullet holes will appear on the screen

Note: Use only shotgun. Other weapons will not work.

The R.P.D.'s main outdoor entrance gate, which Jill passes through in RE3, can also be encountered in RE2 as a well-hidden easter egg. Unlike most areas in the game, this one in particular has a few special requirements in order to be accessed: 1) You need to kill the two zombies that hang out on the lawn directly outside of the R.P.D. If you've activated Brad's presence in the same area, the two lawn zombies will only appear AFTER you've killed Brad and have re-entered the area. They MUST be killed. 2) Head directly across from the R.P.D.'s main entrance doors and check the outer wall (press X). The camera will shift to a view outside of the entrance gate with three additional zombies attempting to break in. This special viewpoint can only be accessed once per visit to the area, so you'll have to re-enter and press X every time you wish to see it again.

In the STARS Office, check Wesker's desk, then continue to check it until right around the 50th time. Take the film to the dark room, and develop it and you will get a secret photo of Rebecca from the first Resident Evil

To get extra costumes for the game, you must first play the game on normal. DO NOT get the extra ammo in the gun-shop or on the bus. When you get to the Police station, near the subway there is a zombie. If you look closely, you will see that it is Brad Vickers, the helicopter pilot from the first one. After killing him, inspect his corpse and you will find a key. This key will unlock a shelf somewhere in the police station that you couldn't before. Inside it are extra costumes for Claire and Leon.

Before you use the custom parts on the VP70(Handgun), Desert Eagle(Magnum) or Shotgun use the remaing ammo in the clip/breech. When you use the custom parts to upgrade the gun it will automatically be fully loaded. This may seem like a small amount of ammo but can go a long way in the harder difficuties were ammo is rarer.

During gameplay, go to the item selection screen. Press the following code depending on which version of the game you own. If the code is done correctly, the amount of ammo in each weapon will show an infinity symbol.

Start a new game on normal. Then do the following:

To get the SMG with unlimited ammo, beat either character's B game in under 3 hours with either an A or B ranking. You will see a special display telling you that you have unlocked it. It will be in the item box in the next game.

To unlock the Gattling Gun, beat either character's B game in under 3 hours with an A ranking. You will see a special display after you beat the game telling you you got it. The gattling gun shoots buttloads of bullets at an enemy, and is very useful against a lot of enemies. It will be in the item box in the next new game.

Start an A Scenario with either Leon or Claire. Start the game, but DON'T COLLECT A SINGLE ITEM. Don't collect the weapon in the Gun Shop, any ammo. Go to the Police Station and down the stairs in the courtyard. A zombified Brad will be there. Kill him one way or another (by collect ammo in the RPD or stabbing him). Collect his ''Special Key'' and take it to the RPD Darkroom. Open the locked by the door and you get new costumes!

Go to the S.T.A.R.S. Office with Leon or Claire. Search the Desk that says ''It's trashed. Someone must have searched the desk''. Search it 50 times! You'll get Secret Film D.

Before you use the custom parts on the VP70(Handgun), Desert Eagle(Magnum) or Shotgun use the remaing ammo in the clip/breech. When you use the custom parts to upgrade the gun it will automatically be fully loaded. This may seem like a small amount of ammo but can go a long way in the harder difficuties were ammo is rarer.