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Destroy All Humans

In a mission, bring up the Start Menu, hold L2, and enter the codes

God mode
Go to the main menu and press L1 L2 L1 L2 triangle triangle square triangle circle X square square and then start a game

BulletProof Crypto (God Mode)
Square, Circle, Left D-Pad, Left D-Pad, Circle, Square<

Orthopox key
Go to mothership & hold L2 while pressing square, circle, left, left, circle, square

Brain stens
60,000000 brain stens press pause and press L1,L2, L1,L2,R1,R2. Submitted by Cuyler.J. Birmmer 6-23-05

Free brains
Hold l2 at the mothership and press r1 r1 r2 r2 left right left right r2 r1. Submitted by Kyle: cena64 6-27-05

Kill enemies with one attack
Pause the game and press O, Square, O, Triangle then you kill enemies in one attack. Submitted by Steven Pettingell

Hint: Running away
While running away from the cops use your jet pack and hold down the jetpack button until you get away you should stay in the air if you go up far enough. Submitted by Alienater 6-27-05

Infinite Jetpack
Hold L2, and press R1, R2, L1, L1, R2. Submitted by Jack 7-01-05

Lower authorities
Press R2 L1 R1 R3 L3. Submitted by blablajinx...not tested

What happened to my house!
Pause and hold l2 push s,c,s,r2,r1,s,r2,c,s,r2,r1,s,c,r1.
All houses in that level will be destroyed raising full alert level and killing any humans near a house. Submitted by Jack 7-011-05 zeenmaster1

Easy Tanks
To take out tanks easily you can do 1 of two things take out your Ionizer gun and shoot a red flashy thing at it hit R1 again to detonate it...or with the disintegrator gun (sp) run to the left and right shooting it. Best works with the multi shot upgrades. Also works with robots and enemy swarms. Submitted by Jeff Thomas 7-13-05

Giant Crypto
Pause game hold L2then press R1 R2 L1 Square Left Right. Submitted by Joseph 7-19-07

You are not alone
R1, R2, l1, L2, Left, Right, Left, Right, this code will allow you to make armies to help you.. Submitted by bob: bobclark2005..xxxxx 8-4-05

Screensaver
Allow the game to idle. Eventually the screen will turn black and white and elevator music will play in the background.

Faster Destruction in the UFO
Instead of holding R to destroy buildings or large objects, tap R1 and the destruction will happen faster without waiting for the recharge.

Getting away from the law
Forget running away from the authorities with short legs. Use your jetpack liberally to fly away. Press Left Analog-stick Forward and hold X to boost away.

Finding more probes
Probes are necessary to get upgrades faster. In order to find them all, make sure to look high up on rocks or hard to reach places. Your jetpack is essential in getting to the high places. You may have to get up on the ledge or building, then use your jetpack to fly higher to get the probe.

HoloBob
Put your target (dot in the middle of the screen) on any human, and press Circle. In order to maintain your HoloBob, you must read the thoughts of the humans walking around. You can read the same person's thoughts repeatedly to keep your mental powers charged.

Better DNA value
Every chance you get, do not kill the human before you extract their brain stem. Extract their brain stem first as it will make the DNA worth more (25 instead of 10).The easiest humans to do this to are the scientists in the level with glowing cows. For some reason, if the person that is important to you dies (the person you need to abduct), extract their brain stem before you return to the Mothership -- the DNA is usually worth more.

Levitation death
It you levitate a person for a long time, they will die.

Lower brain juice meter
When you are in the form of another person, to make you brain juice meter go down, read other people's thoughts.

Staying human
After getting out of your UFO, aim at a human and press Circle. When you have changed into the human, the bar on the top left corner of the screen will go down. When it is all gone, you will change back into an alien. If you want to remain human, turn into a human and while walking around, scan other humans or animals to make the bar on the top left corner stay up.

Moonwalk
Stand in an open area on any level and walk forward. Keep decreasing your speed until you eventually begin walking in place.

Ride the Washington Monument
Find the monument, then throw cars at it until it breaks into two pieces. Get on the long pointy piece, PK the middle, and try to stay on.

Plan 9 From Outer Space reference
Halfway through the game you will experience a level where you go to the drive-in to switch films with the one that is showing. Watch what is showing before you switch films to see that the film is Edward D. Wood, Jr.'s Plan 9 From Outer Space.

Ultimate saucer
Enable the "Bulletproof Crypto" "Ammo-A-Plenty" codes while on your saucer. It will not become damaged or lose ammunition.

Super Crypto
Enable the "Deep Thinker", "Bulletproof Crypto", and "Ammo-A-Plenty" codes then get all of Crypto's upgrades. After this you can turn into a human and walk around TK'ing everything.

Furongami movies
Collect all the probes in the indicated side mission to unlock the corresponding movie in the Furonigami option under the Archives menu.

Art Of The Furon movie: Santa Modesta side mission
Blue Book : Saucer Blueprints movie: Rockwell side mission
Evolution Of An Alien movie: Turnipseed Farm side mission
Face of the Enemy: Area-42
Pathetic Humans!: Union Town
The Concept Barnyard: Capitol City
B-Movie Theater bonuses:
Complete the indicated level to unlock the corresponding movie under the B-Movie Theater option.

B-Movie Theater bonuses:
Complete the indicated level to unlock the corresponding movie under the B-Movie
Theater option.
Furon Down!: Furon Down!
Outro Movie: Attack Of The 50 ft. President
Plan 9 from Outer Space: Teenage Zombies from Outer Space
Teenagers from Outer Space: Attack Of The 50 ft. President

Furon Propaganda Unlockables

Crypto, phone home!
Complete Attack of the 50ft president

Developer Darwinism: Evolution of the game
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

Furon Down!: Furon Down
Outro Movie: Attack Of The 50 ft. President Plan 9 from Outer Space: Teenage Zombies from Outer Space Teenagers from Outer Space: Attack Of The 50 ft. President

Furon Propaganda bonuses
Complete the Attack Of The 50 ft. President level to unlock the following entries under the Furon Propaganda option: Crypto, Phone Home!, Developer Darwinism: Evolution Of The Game, E3 Booth Footage, and Goofy Screenshots And Voice-Overs.

Pox remarks:
Allow the game to idle at the mission selection screen and Pox will make various remarks.

Aware Like A Fox (maximum alert meter):
Pause game play, then hold L2 and press Right, Square, R2, R1, Right, R2, then release L2 while the game is still paused. A message will confirm correct code entry.

Nobody Loves You (reset alert meter):
Pause game play, then hold L2 and press R2, Right, R2, R1, Square, Right, then release L2 while the game is still paused. A message will confirm correct code entry.

Mmm... Brains! (increase DNA)
Hold L2 at the Mothership's main menu and press R1(2), R2(2), Left, Right, Left, Right, R2, R1, then release L2. A message will confirm correct code entry.

Unlimited concentration:
Pause game play, after hold L2 and press R1, R2, Circle, Right, R2, Circle

Get Fat
Pause game play, hold L2 and R2 press X, X, Circle, Circle, Square, Square, Triangle, Triangle, Triangle

Eat humans and cows
Enter L2 and press Left, Right, Square, Square, Circle, Circle, Square. A message should confirm if correctly enter