Operation: WipeOut mode:
Finish the game on any difficulty mode less than 5 five hours.
Unlock the Army and Battle costumes.
Finish the game once
Unlock the Ancient costume (caveman):
Finish the game twice
Unlock Grenade gun and all endings:
Finish the game 3 times. Restart the game again to get
the grenade gun with unlimited ammo.
Solve the puzzle:
When at a puzzle, before changing it, around push the button.
It seems, nothing happened, but if you watch the colored lights
they will turn on in the order needed to solve the puzzle.
Shotgun:
Finish the game once. Regina can start a game next time with a shotgun.
Design Disc code:
After pushing the shelf, enter "367204" as a code.
DDK codes:
The "D" DDK code is "DoctorKirk".
The "H" DDK code is "HEAD".
The "L" DDK code is "LABORATORY".
The "N" DDK code is "NEWCOMER".
The "S" DDK code is "Stabilizer".
Grenade gun with infinite ammo:
Finish the game 3 times and unlock all 3 different endings.
Regina can start a game with the grenade gun with infinite ammo.
