Resident Evil 2 Codes -

Unlimited ammunition:
Press Up(4), Right(4), L, R, L, R, C-Right, C-Left at the load game screen. The game will return to the main menu to confirm correct code entry. An infinity symbol will replace the amount of ammunition remaining to confirm correct code entry.

All weapons:
Press C-Up(4), C-Down(7), L, R, R + L, R + L at the load game screen. The game will return to the main menu to confirm correct code entry.

Invincibility:
Press Down(4), Left(4), L, R(2), L, C-Up, C-Down at the load game screen. The game will return to the main menu to confirm correct code entry.

Randomizer mode:
Successfully complete the game with both scenarios. When starting a new game, a choice for original or randomizer mode will appear after selecting your character and difficulty settings. Randomizer mode places items and objects randomly throughout the game.

Alternate uniforms:
Complete either character's first and second scenarios in less than three hours. A zombie in a uniform will appear after both missions are completed to confirm correct code entry. Load the saved game and begin the first scenario by going to the police station without collecting any items. Quickly move past the zombie that appears in the alley near the police station. Collect the shotgun, then kill the zombie. Take the special key from the zombie's body to open the lockers with alternate uniforms. Claire has a denim jacket, with a quick shooting revolver. Leon has two alternate uniforms (a leather jacket with skull emblem, or a tank top and baseball hat), one of which will allow him to shoot with one hand.

Unlimited weapons:
Complete either character's first scenario in under 2.5 hours with an A or B ranking for the special rocket launcher. Complete either character's second scenario in under 2.5 hours with an A or B ranking for the special gatling gun. Complete either character's second scenario in under 3 hours with an A or B ranking for the special machine gun. The special weapon will appear in the next game after the first chest is opened.

Hunk scenario:
Complete Claire or Leon's second scenario saving less than twelve times with a end time of under two hours and thirty minutes. Hunk is a soldier that must reach the second floor of the police station from the sewer with just battles and no puzzles.

Tofu scenario:
Complete either character's first and second scenarios in less than three hours. Play the game again with the other character, and also complete their first and second scenarios in less than three hours. Play the game a third time and complete either character's first and second scenarios again in less than three hours. Note: The game must saved less than twelve times during each of the six scenarios played and unlimited weapons must not be used. Tofu is a piece of tofu (food) that must reach the second floor of the police station from the sewer with just battles and no puzzles. Tofu can not use any weapons other than a knife.

Ranking system :
To get an A ranking, beat the game in under three hours and do not use any First Aid sprays. Herbs, however, may be used. To get a B ranking, successfully complete the game in under three hours. To get a C ranking, finish the game in five to seven hours. For a D rating, finish the game in seven hours or more. Note: The rank will be lowered by one grade if any special weapons are used, or if the game was saved more than twelve times.

Ada Wong picture:
Walk into the S.T.A.R.S office, go tothe back of the room and click on the desk with the "This desk is trashed someone must of searched it" description. Search the desk fifty times to find a photo of Ada Wong as a basketball player.

Shoot the screen:
While playing Leon's scenario, take the unlimited ammunition shotgun and go to the roof where the helicopter crashed. Stand near the door leading inside, and make sure that a close-up view of Leon appears. Aim the shotgun at the screen and fire. Bullet holes will appear. Note: This may also be done at any location where Leon can aim at the screen with the shotgun.