Invisibility...
	Level Select Codes...
	Miscellaneous Codes...
	Open Doors in Fry Fights Back...

Go to level Red Light District and type in immortality cheat (HoldL1+L2 while holding then press down, square, triangle, down, square, triangle, circle, X, R2, triangle, select). Then interact with suicide booth and walk in. When you come out you will be invisible.

As before - enter these codes during gameplay, simply hold down L1+L2 and then enter the following key combinations to be transported to the respective level-

PLANET EXPRESS
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Up, Select.

SEWERS
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Right, Select.

SUBWAY
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Down, Select.

OLD NEW YORK
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Left, Select.

RED LIGHT DISTRICT
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Triangle, Select.

UPTOWN
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, Circle, Select.

NEW NEW YORK
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Up, X, Select.

CANYON
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Up, Select.

MINE
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Right, Select.

MINE TUNNEL
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Down, Select.

JUNKYARD 1
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Left, Select.

JUNKYARD 2
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Triangle, Select.

JUNKYARD 3
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Right, Circle, Select.

MARKET SQUARE
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Down, Up, Select.

LEFT WING
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Down, Right, Select.

RIGHT WING
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Down, Down, Select.

TEMPLE COURTYARD
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Down, Left, Select.

INNER TEMPLE
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Down, Triangle, Select.

BOGAD'S SWAMP
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Left, Up, Select.

MOM'S HQ BENDER
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Triangle, Up, Select.

Mom's HQ LEELA
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Triangle, Right, Select.

Mom's HQ FRY
Down, Square, Triangle, Down, Square, Triangle, Square, Triangle, Triangle, Down, Select.

During gameplay press and keep held L1+L2 then enter the following combinations for these different effects. The screen should flash blue if it has worked

Infinite Health
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Up, Select

Infinite Ammo
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Right, Select

Infinite Lives
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Down, Select

Infinite Charge
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Left, Select

Immortality
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Triangle, Select.

Unlock All Extras
Down, Square, Triangle, Down, Square, Triangle, Circle, X, R2, Circle, Select.

Here's the solution for the codes to unlock both doors in the level Fry Fights Back:

Room 1: 9, 0, 8, 1, 7, 2, 6, 3, 5, 4
Room 3: 1, 1, 2, 2, 4, 4, 8, 8, 1, 6