Press [F10] at one of the logo screens to enter
the options menu. Then, type DIP (case-sensitive) to display
the debug switch menu. Activate the corresponding DIP switch to
activate the corresponding effect.
Switch

0 Unknown
1 Toggle blood
2 Toggle sound
3 Toggle comic book offer
4 Toggle fatalities
5 Toggle unlimited credits
6 Unknown
7 Unknown
8 Toggle voice
Please submit
any information regarding the unknown codes.
Strategy: by Chris McCullough
Strategy: by luxor