Alternate appearance
 At the first "Start" screen, quickly press Up(2), Down, X, Triangle, Circle. 


 View Babes
 Beat the game after saving all the babes. Then, a new "View Babes"
 options will be available when the next game is started.


 Unlock All Weapons 
 Enter the following code at the Start screen.... 
 Up - Up - Down - Down - Right - Up - Right - Down - Left - Left 
 Note: This code will only work if you have beaten the game 


 Special weapons:
 Press Up(2), Down(2), Right, Up, Right, Down, Left(2) at the first "Start" screen. 
 Every life starts with Rapid Fire guns, followed by a Flame Thrower, Heat Seeker, 
 Ice Gun, and Nukes before repeating. 


 Air not required when swimming:
 Press Down(3), Left, Right, Down, Right, Up, Right(2) at the first "Start" screen. 


 Play as Evil Blasto:
 Press Up, Down, Up, Down, Left, Right, Up, Down, Right, Left at the 
 first "Start" screen.


 Small Blasto:
 Press Right(2), Left, Down, Up at the first "Start" screen.


 Maximum health with every health pill: 
 Press Up, Right(2), Left, Down at the first "Start" screen. 


 Blue laser:
 Press Right, Up, Down, Left, Down, Left, Right, Up, Down, Right at the 
 first "Start" screen. 


 Fire charged shots:
 Press Left(2), Right, Left, Up, Left, Down(2), Left(2) at the first "Start" screen. 


 Motion sickness mode:
 Press Left, Down, Left, Right, Down, Right, Left, Up(2), Right at the 
 first "Start" screen. 

 
  Game Shark Codez:
 
       
  Infinite Lives                                  
  801F1972 0005
       
  Infinite Health                                 
  801F04D4 1770
       
  Moon Jump                                       
  D00CDC08 0040
  801F0318 FFA6
       
  Weapon Select                                   
  800CD432 000?
       
  Quantity Digits to Accompany Weapon Select Code 
       
  2 - Rapid Fire Blaster                          
  3 - Flamespitter                                
  4 - Homing Gun                                  
  5 - Alien Generator                             
  6 - Nuke O Matic                                
  7 - Mega Blast