Complete story mode three times. Note: Enable automatic weapons on the third attempt.
Wide effect ammuntion
Complete story mode four times. Note: Enable unlimited ammunition on the fourth attempt.
Unlimited credits
Intentionally lose the game in story mode. The next time story mode is played, there will be one more credit available. The number of credits will be unlimited (free play mode) after the game is lost with nine credits.
Free play mode
Everytime the player uses all credits in story mode, one credit is added. After nine credits, the credits change to free play mode.
