Free play mode
 
 Go to the adjust settings menu from the main menu. Then choose the
 "Miscellaneous" option, and highlight the "Credit Limit" selection.
 Now hold Square + Circle + Triangle + X. If you entered the code
 correctly, the phrase "Free Play" will appear. If the game settings
 are saved, free play mode will also be included.
 
 Sixteen credits
 
 Set the credits to nine and start the game using controller two. Then
 when player two's ship launches, immediately press Start on
 controller one. Allow player two's ship to be lost. Now player one
 will have sixteen credits. 
 
 Mission select
 
 Go to the difficulty menu from the settings menu. Then, hold R1 + R2
 + L1 + L2 + Start.
 
 Extra options
 
 While playing a game, hold R1 + R2 + L1 + L2 to display a hidden
 options menu. Now the screen resolution, position, and other options
 may be adjusted. 
 
 Infinite continues (Japanese version)
 
 During the game over countdown, press Select.
 
 Power-ups
 
 Look for the slightly off color trees that are not initially
 destroyed by your ship's fire power. They are usually located on the
 right side of the screen. Approach these trees and shoot at them
 until they explode. Capture the pixie that flies out of the
 explosion. Now when your ship is destroyed, a group of power-ups will
 be released. 
 
 Control demo ship
 
 During the Raiden I demonstration, hold L1 to control the ship.
 During the Raiden II demonstration, hold R2 to control the ship.
 
  Game Shark Codez:
 
                   
  Raiden One                
                   
  Infinite Credits          
  8004D5DA 0003
                   
  Infinite Lives P1         
  8012F7F4 0003
                   
  Infinite Nuke Bombs P1    
  8012F802 0003
                   
  Max Homing Missiles P1    
  8012F800 0004
                   
  Max Vulcan P1             
  8012F7FA 0008
                   
  Max Laser P1              
  8012F7FC 0008
                   
  Max Nuke Missiles P1      
  8012F7FE 0004
                   
  Infinite Lives P2         
  8012F824 0003
                   
  Infinite Nuke Bombs P2    
  8012F832 0003
                   
  Max Homing Missiles P2    
  8012F830 0004
                   
  Max Vulcan P2             
  8012F82A 0008
                   
  Max Laser P2              
  8012F82C 0008
                   
  Max Nuke Missiles P2      
  8012F82E 0004
                   
  Raiden Two                
                   
  Infinite Credits          
  800FFC24 0003
                   
  Infinite Lives P1         
  800ECF40 0003
                   
  Infinite Thermonukes P1   
  800ECF38 0101
                   
  Infinite Cluster Bombs P1 
  800ECF38 0202
                   
  Max Vulcan P1             
  800ECF28 0008
                   
  Max Laser P1              
  800ECF2A 0008
                   
  Max Plasma P1             
  800ECF2C 0008
                   
  Max Nuclear Missiles P1   
  800ECF30 0004
                   
  Max Homing Missiles P1    
  800ECF32 0004
                   
  Infinite Nuke Bombs P1    
  800ECF3C 0003
                   
  Infinite Lives P2         
  800ECF80 0003
                   
  Infinite Thermonukes P2   
  800ECF78 0101
                   
  Infinite Cluster Bombs P2 
  800ECF78 0202
                   
  Max Vulcan P2             
  800ECF68 0008
                   
  Max Laser P2              
  800ECF6A 0008
                   
  Max Plasma P2             
  800ECF6C 0008
                   
  Max Nuclear Missiles P2   
  800ECF70 0004
                   
  Max Homing Missiles P2    
  800ECF72 0004
                   
  Infinite Nuke Bombs P2    
  800ECF7C 0003