CodeEffect

IDDQDGod mode

IDKFAAll weapons and ammo

IDFAWeapons but no keys

IDCHOPPERSChainsaw

IDSPISPOPDWalk through walls

IDMYPOSCoordinates (in hexadecimal) 

IDDTMap toggle

IDBEHOLDCheat Menu
IDBEHOLDAArea Map

IDBEHOLDVTemporary invulnerbility
IDBEHOLDITemporary invisibilty
IDBEHOLDLLight amplification visor

IDBEHOLDSBerserk Mode
IDBEHOLDR Radiation suit

IDCLEV##Skip to episode #, level #
IDMUS##     Change music to indicated level   

Thanks to Revolution readers John, Notorious B.O.B, Troy Amsom, Adrian, Freddie

Naylor-Leyland, Cooper, Daniel Richter, The Elf, and George Tsantrizos!!