Killer 8: 100 Serum Vials

Press Down, R1, Up, L1, Square, X, Triangle(2), 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.

Killer 8 mode

Successfully complete the game under the normal or hard difficulty setting. Young Harman is a playable character in this mode.

Hopper 7 mode

Successfully complete the game in Killer 8 mode.

Alternate ending sequence

Successfully complete Killer 8 mode.