Cheat mode
 
 While playing a game, hold L1 + R1 + R2 and press Select to enable
 cheat mode. If you entered the code correctly, "Cheats Enabled" will
 appear at the top of the screen. Then, one of the following codes may
 now be enabled: 
 
 God mode
 
 Hold L1 + R1 + R2 and press Up, Down, Left, Right.
 
 Invulnerable
 
 Hold L1 + R1 and press Up, Down, Left, Right.
 
 Infinite weapons
 
 Hold L1 + R1 and press Up, Down, Up, R2.
 
 Powered-up weapons
 
 Hold L1 + R1 + R2 + X and press Down.
 
 Hornet nest stingers
 
 Select stingers, then press L1 + L2 + R1 + Triangle + Left.
 
 Play as Big Daddy
 
 Enter Triangle, Square, R2, X, Triangle, R2 as a password. Then,
 select "Challenge" mode and choose the "Nuke York" level to enable
 Big Daddy on the vehicle selection screen.
 
 Play as Alien saucer
 
 Enter R1, Square, X, Square, L2, Circle as a password.
 
 Play as Goliath
 
 Enter Triangle, L1, R1, X, L2, L2 as a password.
 
 Play as Nightshade
 
 Enter R1, R2, L1, L1, X, Circle as a password.
 
 Play as Helicopter
 
 Enter L1, Triangle, R2, Triangle, Triangle, R1 as a password. -From:
 LALAKERKB8@aol.com
 
 Funtopia level
 
 Enter X, Circle, L2, X, Square, L1 as a password to unlock the
 Funtopia level under "Challenge" mode.
 
 Gulch level
 
 Enter X, Square, Circle, L1, L2, Square as a password to unlock the
 Gulch level under "Challenge" mode. Alternately, enter Square,
 Square, Triangle, R1, L1, Circle as a password.
 
 Boss Battle 1
 
 Enter Circle, R2, R1, Square, L1, R2 as a password. Note: Re-enter
 this password after every challenge battle. The first opponent will
 be a normal, random, character. Your opponent will transform into
 Goliath after the battle. 
 
 Boss Battle 2
 
 Enter Circle, Circle, L2, L1, Triangle, Triangle as a password. -From:
 rbknic@stlnet.com
 
 Boss Battle with Big Daddy
 
 Enter Square, Triangle, Circle, Circle, R2, R2 as a password. Then,
 select "Challenge" mode and choose the "Nuke York" level to battle
 against Big Daddy. -From: rbknic@stlnet.com
 
 Double pick-ups
 
 Enter L1, L2, Circle, L1, R1, Square as a password.
 
 Increased armor
 
 Enter R1, Triangle, R1, Triangle, L1, Square as a password.
 
 Infinite turbos
 
 Enter Square, X, Circle, Triangle, R1, R2 as a password. Note: The
 special bar will still decrease, but turbos will still be available
 after it runs out. 
 
 Infinite jump
 
 Enter Circle, Square, R2, X, Triangle, R2 as a password. -From:
 rbknic@stlnet.com
 
 View Duke Nukem: Time To Kill FMV sequence
 
 Enter Square, Square, Circle, Circle, Triangle, Triangle as a
 password. 
 
 Alternate views
 
 While playing a game in one player mode, hold R1 + Select and press
 Down to switch to an overhead and helicopter view. In multi-player
 mode, this will alternate how the screen is split. -From:
 Edward023@aol.com 
 
 Full screen view
 
 While playing a game, hold R1 + Select and press Up to remove all
 items from the screen.
 
 Combo moves
 
 
 
  Move                        
  Code                                         
 
 
  Jump                        
  Press L1 + R1                                
 
 
  Shield                      
  Hold Triangle and press Up, Right, Down, Left
 
 
  Stun                        
  Hold Triangle and press Right, Left, Up      
 
 
  Cash suck                   
  Hold Triangle and press Left, Right, Up      
 
 
  Rear fire                   
  Hold Triangle and press Right, Left, Down    
 
 
  Mine                        
  Hold Triangle and press Left, Right, Down    
 
 
  Up on 2 wheels to the left  
  Hold Triangle and press Up, Down, Left       
 
 
  Up on 2 wheels to the right 
  Hold Triangle and press Up, Down, Right      
 
  Game Shark Codez:
 
               
  Unlock Alien Saucer               
  301B39AB 0001
               
  Unlock Goliath                    
  301B39A8 0001
               
  Unlock Helicopter                 
  301B39AC 0001
               
  Unlock Nightshade                 
  301B39A9 0001
               
  Drive Through Walls (All Players) 
  8010E53A 2400
               
  Player 1 Codes                    
               
  Infinite Armor                    
  801D80B4 014A
               
  Infinite Specials                 
  301D824F 0063
               
  Infinite Stingers                 
  301D8250 0063
               
  Infinite Blasters                 
  301D8251 0063
               
  Infinite Stalkers                 
  301D8252 0063
               
  Infinite Scorches                 
  301D8253 0063
               
  Infinite Meteors                  
  301D8254 0063
               
  Infinite Ejects                   
  301D8255 0063
               
  Infinite RLBs                     
  301D8256 0063
               
  Infinite Prowlers                 
  301D8257 0063
               
  Infinite Upgraded Stingers        
  301D8259 0063
               
  Infinite Upgraded Blasters        
  301D825A 0063
               
  Infinite Upgraded Stalkers        
  301D825B 0063
               
  Infinite Upgraded Scorches        
  301D825C 0063
               
  Infinite Upgraded Meteors         
  301D825D 0063
               
  Infinite Upgraded Ejects          
  301D825E 0063
               
  Infinite Upgraded RLBs            
  301D825F 0063
               
  Infinite Upgraded Prowlers        
  301D8260 0063
               
  Infinite Cash                     
  801D8784 FFFF
               
  Player 2 Codes                    
               
  Infinite Armor                    
  801D896C 00B4
               
  Infinite Specials                 
  310D8B07 0063
               
  Infinite Stingers                 
  310D8B08 0063
               
  Infinite Blasters                 
  310D8B09 0063
               
  Infinite Stalkers                 
  310D8B0A 0063
               
  Infinite Scorches                 
  310D8B0B 0063
               
  Infinite Meteors                  
  310D8B0C 0063
               
  Infinite Ejects                   
  310D8B0D 0063
               
  Infinite RLBs                     
  310D8B0E 0063
               
  Infinite Prowlers                 
  310D8B0F 0063
               
  Infinite Upgraded Stingers        
  310D8B11 0063
               
  Infinite Upgraded Blasters        
  310D8B12 0063
               
  Infinite Upgraded Stalkers        
  310D8B13 0063
               
  Infinite Upgraded Scorches        
  310D8B14 0063
               
  Infinite Upgraded Meteors         
  310D8B15 0063
               
  Infinite Upgraded Ejects          
  310D8B16 0063
               
  Infinite Upgraded RLBs            
  310D8B17 0063
               
  Infinite Upgraded Prowlers        
  310D8B18 0063
               
  Infinite Cash                     
  801D903C FFFF