Killer 7 Cheats
Killer 8: 100 serum vials:
Enter code while playing the game.
Code: Down, R, Up, L, Y, B, X, A(2)
Alternate ending sequence
Finish Killer 8 mode.
Killer 8 mode
Finish the game under the normal or hard difficulty setting. Young Harman is a playable character in this mode.
Hopper 7 mode
Finish the game in Killer 8 mode.