Invincibility
 
 At the main menu, press L2, L1, R2, Circle, Square, Circle(2), L1,
 L2, L1. 
 
 Secret level
 
 At the main menu, press L1, L2, L1, L2, R2, R1, Square, Circle,
 Square(2). 
 
 All tanks
 
 At the main menu, press L1, L2, L1, Circle, Square, Circle(2), L2,
 L1, R2. Now you will have access to a super tank with unlimited
 weapons and all other tanks. 
 
  Game Shark Codez:
 
                   
  Joker Command             
  D008E6AC ????
                   
  Infinite Shield           
  800B7564 00C8
  800B7566 00C8
  800B7568 00C8
  800B756A 00C8
                   
  Infinite Cannon           
  800B7708 0008
                   
  Infinite Guided Missiles  
  800B76AE 0008
                   
  Infinite Ion Cannon       
  800B7678 0100
                   
  Infinite Specials         
  800B76D2 00E8
                   
  Infinite Mines            
  800B76F6 0010
                   
  Infinite Phoenix Missiles 
  800B76C0 0008
                   
  Infinite Plasma           
  800B768A 0100
                   
  Infinite Laser I          
  800B7654 0100
                   
  Infinite Laser II         
  800B7666 0100
                   
  Secret Tank Codes         
                   
  Venom                     
  800B6EA8 0003
  8010C390 0003
                   
  Viper                     
  800B6EA8 0004
  8010C390 0004
                   
  Cobra                     
  800B6EA8 0005
  8010C390 0005
                   
  Rattler                   
  800B6EA8 0006
  8010C390 0006
                   
  Fang                      
  800B6EA8 0007
  8010C390 0007
                   
  Death Adder               
  800B6EA8 0008
  8010C390 0008
                   
  Python                    
  800B6EA8 0009
  8010C390 0009
                   
  Desert King               
  800B6EA8 000A
  8010C390 000A
                   
  Anaconda                  
  800B6EA8 000B
  8010C390 000B