Killer7 Unlockable Game Mode

100 Serum Vials in Killer 8 mode: Go to the %u201CPress Start%u201D screen and enter Down, R1, Up, L1, Square, X, Triangle, Triangle. After you entered, you will hear a sound. To get another 100 vials, replay the code enabled level.

Play as Young Harman: Successfully complete the game on the normal or hard difficulty setting to unlock Young Harman.

Killer 8 mode: Complete the game on the normal or hard difficulty setting to unlock the Killer 8 difficulty setting.

Hopper 7 mode: Complete the game on the Killer 8 difficulty setting to unlock the Hopper 7 difficulty setting.

Alternate ending sequence: Complete the game on the Killer 8 difficulty setting to view an alternate ending sequence.

Killer7 Cheats and Code Data Information
Game Title : Killer7
Developer : Grasshopper Manufacture
Publisher : Capcom
Platform : GameCube, PlayStation 2
Genre : Action-adventure, Rail shooter, Role-playing
Mode : Single-player
Release date : JP June 9, 2005, NA July 7, 2005, PAL July 15, 2005

source article from : Killer7 Cheats GameCube