Training Levels
Enter "Up," "Triangle," "Up," "X," "Down," "X," "Down," "X," "Down," "X" for the Basic Training level, or "Down," "X," "Down," "X," "Down," "X," "Down," "X," "Down," "Square" for the Advanced Training level.
Other Levels
Enter "Down," "X," "Down," "X," "Down," "X," "Down," "Triangle," "Up," "X" for the Final Battle level; "Down," "X," "Down," "X," "Down," "X," "Down," "X," "Up," "Triangle" for the Basement level; or "Up," "X," "Down," "X," "Down," "X," "Down," "X," "Down," "X" for the Museum level.
Enter "Down," "Triangle," "Down," "X," "Down," "X," "Down," "X," "Down," "X" for the Seep's Hood level; "Down," "X," "Up," "X," "Down," "X," "Down," "X," "Down," "X" for the Corner Store level; "Down," "X," "Down," "Triangle," "Down," "X," "Down," "X," "Down," "X" for the My House level; or "Down," "X," "Down," "X," "Up," "X," "Down," "X," "Down," "X" for the Udder Madness level.
Use Down, X, Down, X, Down, Triangle, Down, X, Down, X for the "How a Cow Becomes a Steak" level; Down, X, Down, X, Down, X, Up, X, Down, X for the "Burger Tram" level; Down, X, Down, X, Down, X, Down, Triangle, Down, X for the "Higher Learning" level or Down, X, Down, X, Down, X, Down, X, Up, X for the "Growth Spurt" stage.
Press Down, X, Down, X, Down, X, Down, X, Down, Triangle for the "Bottom of the Bell Curve" level; Up, Triangle, Down, X, Down, X, Down, X, Down, X for the "Big Trouble in Little Downtown" level; Down, Triangle, Up, X, Down, X, Down, X, Down, X for the "Moving On Up" level or Down, X, Up, Triangle, Down, X, Down, X, Down, X for the "Burn it Down" level.
Use Down, X, Down, Triangle, Up, X, Down, X, Down, X for the "Happy Trails Insanitarium" level; Down, X, Down, X, Up, Triangle, Down, X, Down, X for the "Inner Madness" level; Down, X, Down, X, Down, Triangle, Up, X, Down, X for the "Shock Treatment" level or Down, X, Down, X, Down, X, Up, Triangle, Down, X for the "Into the Box" level.
Character Health and Stamina
Use the code "Up," "Up," "Down," "Down," "X," "Circle," "Triangle," "Square," "X," "X" to increase both the health and stamina of your character. Alternately, you can use "Up," "Up," "Down," "Down," "Left," "Left," "Right," "Right," "Square," "Triangle" for complete invincibility.
Items and Weapons
Obtain all the weapons and weapon upgrades with the code "Up," "Up," "Down," "Down," "Left," "Right," "Left," "Right," "X," "Circle." Refill your ammo with the code "Triangle," "Triangle," "X," "X," "Square," "Circle," "Square," "Circle," "Down," "Right," or receive unlimited ammo with the code "Triangle," "Triangle," "X," "X," "Square," "Circle," "Square," "Circle," "Right," "Down."