Resident Evil 4 (Collector's Pack) Cheats (PS2)

Without using a Gameshark (or similar device), you can keep the Special Launcher Ada
throws down during the final fight. Simply unlock the P.R.L. weapon unlocked by completing
Professional difficulty mode to waste Saddler. When Ada tosses out the Special Launcher,
get it, and finish Saddler with the P.R.L. When you begin the game again, you will have
Special Launcher (note still one shot).

Clear Leon's Story on Professional difficulty to unlock the PRL 412 weapon. It has two
settings -- stun and kill (just like Star Trek) which you may determine by holding
or tapping the fire button. It has infinite ammunition.

To unlock the Thompson Submachinegun, clear Leon's story mode (any difficulty) and
complete Ada's story mode (Separate Ways). Purchase it from the Roma merchant when playing
a new game plus.

Ada can also have the weapon available for her own side-story mission (Assignment Ada)
simply simply clearing that particular mode once. Again, speak with the Roma merchant to
access it.

You must get 3000 or more points in Game D.

Clear the main game (any difficulty) to unlock:

Professional Difficulty

Mercenaries Challenge

Separate Ways mini-campaign

Assignment Ada mini-campaign

Alternate costumes for Leon, Ashley, and Ada Wong

Each weapon has a special "exclusive power" when all of its stats are custom tuned to the
maximum:

HANDGUN- 5 times more of a chance of  critacal head shot

PUNISHER- Each bullet can penetrate up to five bodies. 

RED 9- Increases firepower to 6.5

BLACKTRAIL- Increases firepower to 3.4

MATILDA- Increases magazine capacity to 100. 

SHOTGUN- Increases the effective damage range of the gun. 

RIOTGUN- Increases firepower to 10.0 and 8.0 at long range

STRIKER- Increases magazine capacity to 100. 

RIFLE- Increases firepower to 30.0

SEMIAUTO RIFLE- Decreases firing speed to 0.42 seconds. 

BROKEN BUTTERFLY- Increases damage to 50.0

KILLER7- No exclusive power! 

TMP- Increases firepower to 1.8

Minethrower - Adds homing ability to mines

In order to do this trick you need to first pick Leon's gangster outfit, and then equip
the Chicago Typewriter machinegun. Reload the machinegun a few times in a row and Leon
will pose.

Clear the Separate Ways mode to unlock more costumes for Leon and Ashley.

Leon may sit in the red throne after the laser hallway by inspecting it. Nothing
interesting occurs, but it makes for an interesting screenshot.