Infinite Ammo:
For infinite ammunition for your firearms, insert the following password at the main menu: Up, Down, Left, Right, Up, Down, Left, Right.
(supplied by: girlpearl)
Level Select:
To be able to select from any level in the game, whether or not you've already beaten it or not, insert the following code on the game's title screen: Up, Up, Down, Down, Left, Right, Left, Right.
(supplied by: girlpearl)
Unlock Bonus Level with Leo:
Complete the game once.
(supplied by: girlpearl)
