Cheat code/Extra modes

 

Killer 8

Complete full game on normal or hard mode

 

Hopper 7

Complete Killer 8 mode

 

100 Serum Vials

Enter this code at the press start screen. You will get 100 free vials of serum each time that you start the first level.
By starting the first level repeatedly, you will receive 100 free vials each time giving you an infinite amount.
This will only work in Killer 8 mode only.

Gamecube: Down, R, Up, L, Y, B, X, A

PS2: Down, R, Up, L1, Square, X, Triangle,Triangle

 

Unlock Young Harman

 

Complete full game on normal or hard mode. NOTE: He's only playable on Killer 8 mode.

Harman Smith

 

Weapon: Tommy gun
Toughness: 300
Movement speed: 7.7cm
Magazine size: 50
Special Abilities: None, but is heavily armed & dangerous.
Age: 30
Stature: 5'8
Killer Abilities

Counter Attack: Power 1,Speed 4, Waver 0.2, Critical 1

You may want to click the Harman/Emir link