Enter one of the following codes to activate the 
corresponding cheat option. 
The phrase "Code Activated" will confirm correct code 
entry. Then, enter the cheat menu to activate the code.

Effect          Retail version  3Dfx version  
-----------------------------------------
Invincibility   LLSNMRTN        DDDNSTBR 
Spirit mode     MBRNKLSN        NDNLP 
All weapons     MGRLSGTM        THMSCLS 
Unlimited ammo  RHNSRLL         LNJHNSN 
Big heads       PRMSHN          RBCHN 
All map         TRNTNNQ         GNNTRTMNT 
Dana mode1      HFLLTHSH        JSNCRPNTR 
Purdy colors    CRLSFNDNGS      CRLSFNDNGS 
Gallery         HTSDNM          SHNTRRNT 
View credits    LRNMSNHR        THTRTMBB 
Unlimited lives JFFSPNGDNBRG    JFFSPNGDNBRG 
Quack mode2     GSRCGKFS        DNLDDCK 
All keys        DGHTTSRS        NGLCKCK 
Fly mode        KNTSFSKS        BKSTRD 
Show enemies    TKMDKK          FHGTBC 
Disco mode      BGGNTSS         JHNNCK