Killer 7 Unlock Killer 8
Clear the game and unlock Killer 8 mode, where the changes include:
* Enemy critical spots are invisible
* Enemy explosions do five times normal damage
* Clue and map icons are hidden on the map menu
Killer 7 Unlock Hopper 7
Unlock Hopper 7 mode by clearing Killer 8 mode. Hopper 7 only plays through the first stage.
Killer 7 Unlockable: Alternative Ending
Finish the game on Killer8 difficulty.
Killer 7 Unlockable: 100 Vials of Blood on Killer8 Mode
Go to the press start screen of killer8. Enter DOWN, R1, UP, L1, SQUARE, TRIANGLE, CIRCLE, CIRCLE. A sound will shime to confirm the code. Press start.
Killer 7 Hint: 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.