GameShark Codes:
Effect
Code
Silencer Mode
C49BAAF500000020
Big Head Mode
C49BAAF500000002
Big Head/Silencer Mode
C49BAAF500000022
Big Head/Zombie Mode
C49BAAF500000042
Big Head/Zombie/Silencer Mode
C49BAAF5000000F2
Zombie Mode
C49BAAF500000040
Infinite Credits
6F8B665E00000009
Infinite Health P1
EB1F159400000003
Infinite Health P2
4DD212D600000003