Infinite Vials of Serum for killer 8 mode:
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 recieve 100 free vials each time giving you an infinite amount. This will only work in Killer 8 mode only.
Cheat Effect
Down, R, Up, L, Y, B, X, A 100 vials of serum
Extra game modes:
Unlockable How to Unlock
Hopper 7 mode Complete Killer 8 mode
Killer 8 hard mode Complete full game on normal or hard mode
Playable character: Young Harman Complete full game on normal or hard mode
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