Killer 7 Cheats Playstation 2 at Your Game Cheats

Unlock Play As Young Harman
Beat game on Normal or Hard

Unlock Hopper 7
Beat game on Killer 8 difficulty

Killer 8: 100 Serum Vials
Press (Down), (R1), (Up), (L1), (Square), (X), (Triangle)x2, at the the "Press Start" screen. The healing sound will confirm correct code entry. You will get the vials when you start Target: Angel. Repeat the level over with the code enabled to get another 100 vials.

Thick Blood & Serum
Thick blood is not carried over from stage to stage, but serum is. The blood machine in each stage will cease to function if you revisit the stage, so learn to collect as much thick blood as possible in a stage and break the machine before moving on.

Unlock Killer 8 difficulty
Beat game on Normal or Hard

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Playstation 2 Cheats: Killer 7 Cheats