Resident Evil 4 Cheats

Unlockable: Punisher Weapon
You, know the guy, who runs around and sells you upgrades for weapons, he has a secret quest for you. You must search two areas of the game for blue medallions and shoot them. Finding and shooting more than 10 of the medallions will reward you with the punisher pistol. This weapon has slightly upgraded statistics and penetrating bullets.

Unlockable: Assignment Ada Mini-game
Beat the game to unlock the mini game: Assignment Ada
Unockable: Mercenaries Mini-Game Characters

* To unlock Ada Wong in Mercenaries get a 4 star rating on the Pueblo map of the game.
* To unlock Albert Wesker in Mercenaries get a 4 star rating on the Waterworld map of the game.
* To unlock Hunk in Mercenaries get a 4 star rating on the Island Commando map of the game.
* To unlock Jack Krauser in Mercenaries get a 4 star rating on the Castle map of the game.

Unlockable: Broken Butterfly Weapon
In the hall south of the hedge maze there is a locked door. Return to that area with Ashley, piggy back with her and she will unlock the door. This reveals the broken butterfly.
Unlock Matilda Weapon
Unlock the Matilda handgun (which fires 3 round bursts) by clearing the game.

Unlockable: Hand Cannon Weapon
Get the five star ranking on the mercenaries mini-game to unlock the Handcannon.
Unlockable: Chicago Typewriter Weapon
Beat Operation Ada, and the “Chicago Typewriter”, a Thompson with 10.0 firepower, infinite ammo, no reload, and the fire rate of a maxed out TMP, becomes available at the merchant.

Unlockable: Rocket Launcher
In order to unlock the Rocket Launcher Special you beat the game on Normal and you get a chance too buy the Matilda and the Infinite Launcher. The Matilda is $70,000 and the Infinite Launcher is $1000000.

Unlockable: S.T.A.R.S. Uniform
To Unlock The S.T.A.R.S. Uniform You Must Complete The Game On Normal Or Hard Mode.