First of all, you should know that to do this, you need an Action Replay.

Table of contents:

1.- Player modifier codes
+ How to use the player modifier codes.
+ Encrypted and unencrypted Action Replay player modifier codes.

2.- Glitches
+ Weapon crashing.
+ Radio calls.
+ Weapon mixing.
+ Invisibility during cutscenes.

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Player modifier codes:

How to use the player modifier codes:
To use these codes without the game crashing, while playing as Leon, unequip your weapons (to do this easily, equip a grenade then throw it away), save the game, enable only one player modifier code, then open the save.

Also, make sure that you don't have a Tactical Vest equipped (if so, sell it), otherwise the game will freeze.

Encrypted and unencrypted player modifier Action Replay codes:

All these codes were created by Y.S, I only encrypted the raw codes.
These codes only work on the NTSC version of the game.

Raw (unencrypted code):
00284794 0000000X

0 Leon
1 Ashley
2 Ada
3 Hunk
4 Krauser
5 Wesker

Encrypted codes:

Play as Leon:
FHBY-H9E8-E412W
6HUB-BAR2-VDCYU

Play as Ashley:
TEFN-CUE6-66949
3GKE-M0UE-JWPA8

Play as Ada:
2XPM-149R-GDB43
NM87-J0ZB-G39U1

Play as HUNK:
9GC4-86D5-5MMDN
YZY1-X2H1-2ECRF

Play as Krauser:
2BA4-TNGK-1HCT1
T2CT-YERW-TDU6Y

Play as Wesker:
FHMV-0PB2-JTBK5
9TGG-DFPM-APFY0

~~~

Glitches:

Weapon crashing :
When you equip a weapon that is not designed for the player (eg. Rocket Launcher for Wesker), the game will crash.

Radio calls:
If you are not playing as Leon or Wesker, any radio call will crash the game, with Wesker, there is a 20% probability of the game crashing when you receive a radio call, to prevent this, press START as soon as you receive a radio call, the cutscene will be skipped and the game won't crash.

If you can't get past the first area in the game, it is because of this glitch.





Weapon mixing:
There's a way of not crashing the game when equipping a weapon not designed for the character, and it is by "mixing weapons", this glitch will cause a weapon to be mixed with a weapon not designed for the character, for example, mixing Ada's Punisher with a Rocket Launcher will give a Punisher with ammo that are as powerful as Rockets.

1.- Equip a weapon. (I'll use TMP in this example)



2.- Exit the start screen.



3.- Press Y to open the start screen again.



4.- Equip a grenade or an egg.



5.- Equip a weapon not designed for your character. (I'll use Rocket Launcher in this example)



6.- Your character will take a neutral pose, exit the start screen.

When you shoot this weapon, it will shoot as fast as a TMP and it will be as powerful as a Rocket Launcher.



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Invisiblity during cutscenes:
When playing as Ashley, Ada, HUNK, Krauser or Wesker, you will be invisible during most cutscenes.