Forsaken
Gore Mode
For Gore Mode press Z, Down, C-up C-left, C-left, C-left, C-left, C-down at the "Press Start" Screen.
Psychedelic Mode
For Psychedelic Mode press A, Right Shoulder, Left, Right, Down, C-up, C-left at the "Press Start" Screen.
Turbo Crazy Mode
For Turbo Crazy Mode press B, B, Right Shoulder, Up, Left, Down, C-up, C-left at the "Press Start" Screen. This gives you unlimited turbo boosts.
Wire-frame Mode
For Wire-frame Mode press Left Shoulder, Left Shoulder, Right Shoulder, Z, Left, Right, C-up, C-right at the "Press Start" Screen.