Agent Armstrong

Cheat mode
The following location must be found to enable cheat mode. After the game begins, move to the right until reaching a location with a teddy bear. Then, face the wall and press Circle to jump in that direction. If done correctly, you will hear a muted sound. Now move forward and walk in the next room just to the right of this location, which leads down into a small room. Press Circle to access a platform. Use this platform to reach a playroom and activate cheat mode. The following codes may now be enabled:

Invincibility
While playing the game, press X(4), Triangle, Circle, X, Square on controller two.

All weapons
While playing the game, press Circle(3), Triangle(2), X(2), Square on controller two.

Level select
While playing the game, press Triangle(3), Square(3), X(2), Circle on controller two.

Game Shark Codes

Joker Command -- D00D2230 ????
Infinite Health -- 8013BAFC 0400 8011 87BC 0400
Infinite Grenades -- 8013BA60 0003
Infinite Ammo -- 8013BAEA 0074 801187AA 0074
Infinite Fire/Bullet -- 80118738 000F
Infinite Health -- 800A3AD0 0000 800A3AD2 0000
Infinite Energy And All Weapon Available -- 800D2010 0001
Mission Select [Note] -- D00D2230 0102 800D2092 0001 800D2010 0001