Deep Thinker:
Pause game-play and hold the left trigger and enter Black, White, Y, Right, White, Y. Nobody Loves You:
Pause game-play and hold the left trigger and enter White, Right, White, Black, X, Right. Unlimited Ammo:
Pause game-play and hold the left trigger and enter Left, Y, White, Right, Black, X.

Bulletproof Crypto:
Pause game-play and hold the left trigger and enter X, Y, Left, Left, Y, X.

Unlock Upgrades:
When you are at the 'Mothership' pause game-play and hold the left trigger and enter X, Y, Left, Left, Y, X. The upgrades for the unlocked weapons will all become available at Pox's lab.


Probe unlockables
All the movies which you unlock will be in the Furonigami section in the archives. All the probes are needed to unlock a movie. Evolution of an alien movie:
Collect all the probes in Turnipseed Farm

Blue Book : Saucer Blueprints movie:
Collect all the probes in Rockwell

Art of the Furon movie:
Collect all the probes in Santa Modesta


Unlock B-Movies

Plan 9 from Outer Space clip:
Beat the Teenage Zombies from Outer Space mission

Unlock Outro Movie clip:
Complete Attack of the 50ft President

Unlock Teenagers from Outer Space clip:
Complete Attack of the 50ft President

Unlock Furon Down!clip:
Complete Furon Down!

Full-length Teenagers from Outer Space:
Beat the game