You have to be on Mothership. Go to the start menu, hold L2, then enter R1, R1, R2, R2, LEFT, RIGHT, LEFT, RIGHT, R2.

During a mission go to the start menu, hold L2, then enter RIGHT, SQUARE, R2, R1, RIGHT, R2.

During a mission go to the start menu, hold L2, then enter Right, R2, R1, Square, Right.

Pause the game and hold L2. Enter LEFT, CIRCLE, R2, RIGHT, R1, SQUARE.

Pause the game and hold L2. Enter R1, R2, CIRCLE, RIGHT, R2, CIRCLE. Your MC meter will not decline, but make sure it's above zero for the code to work.

Go to the mothership. Pause the game and hold L2. Enter SQUARE, CIRCLE, LEFT, LEFT, CIRCLE, SQUARE. All the upgrades for the unlocked weapons will become available at Pox's lab.

Pause and hold L2. Enter SQUARE, CIRCLE, LEFT, LEFT, CIRCLE, SQUARE.

Crypto phone home: Complete attack of the 50ft president.
E3 booth footage: Complete attack of the 50ft president.
Goofy screenshots and voice overs: Complete attack of the 50ft president.
Art of the Furon movie: Collect all the probes in Santa Modesta
Blue Book : Saucer Blueprints movie: Collect all the probes in Rockwell
Evolution of an alien movie: Collect all the probes in Turnipseed Farm
Face of the enemy movie: Collect all the probes in Area-42
Pathetic Humans! movie: Collect all the probes in Union Town
The Concept Barnyard movie: Collect all the probes in Capitol City
Full-length Teenagers from Outer Space: Finish the game
Outro movie: Complete attack of the 50ft president.
Plan 9 from Outer Space clip: Defeat the Teenage Zombies from Outer Space mission