Enter 537893 as a code. Alternately, successfully complete the game.
Arcade mode
Successfully complete the game to unlock the "Arcade" option at the "Extra Content" menu.
Cheat Codes
To enter these, simply scroll down to "Extra Content" and pull the right trigger, or push the R1 button. A keypad will appear.
Game Cheats:
Take Less Damage: 548975
Use less PSI power: 456456
AllPowers: 537893
Unlimited Ammo: 978945
No Head: 987978
Playing Modes
Arcade Mode: 05051979
Coop Mode: 07041979
Survival Mode: 7734206
Dark Mode: 465486
Nick Models
Training Nick: 564689
Urban Nick: 484646
Wasteland Nick: 975466
Stealth Nick: 456498
Sara Models
Sara: 135488
Psi Sara: 468799
Suicide Sara: 678999
Barett Models
Barrett: 497878
Training Barret1: 196001
Training Barret2: 196002
Training Barret3: 196003
Training Barret4: 196004
Training Barret5: 196005
Training Barret6: 196006
To enter the codes, highlight the "Extra Content" option and press R. When the keypad screen appears, enter one of the following codes to unlock the corresponding cheat. Then, choose the "Mission Select" option in the "Extra Content" menu. Start the game through that option after toggling the desired cheats on or off.
Defeating Edgar Barret - Master of Telekinesis
TK the objects on the conveyor belt and throw them at Barret. After you get his health down a bit, he will take the fight outdoors. Just do the same thing until you defeat him. Watch out when he throws the large crates and boxcars at you. They can kill you in one hit if you are not careful. Wait until he rests, then nail him.
Defeating Jov Lenov - Master of Mind Control
TK the MPs that Lenov is MCing and throw them at the machines. After you destroy all of the machines, Lenov will fight you. Just use your gun or TK the MPs and throw them at him.
Defeating Marlena Kessler - Master of Pyrokinesis
Use TK to pick up and throw the canisters at the large gun. To avoid the huge blast, go to the back of the room. You will notice some glass things that popped out of the floor. Get behind one of them. Once you destroy the huge weapon,
Marlena will fight you. TK the canisters and throw them at her to defeat her. Note: The canisters will refill after you use them all (they must all explode). Also, make sure you are on the side that she is on.
Defeating Nicholas Wrightson - Master of Remote Viewing
Destroy all the screens in the room to defeat Wrightson. You can only destroy them when they are firing. Just dodge the ray and shoot them. Be sure to also, avoid the Aura Beasts in the room.
Defeating The General - Leader of The Movement
Use PK on each Monolith pillar (the spinning things). Upon destroying them you can collect up to six orbs (which will be scattered around the room) for your new psionic weapon. Once The General gets to full health, the fight will begin. Just
shoot him with the psionic weapon to damage him. You can refill your psionic weapon's ammunition by getting in the center of the Monolith. Note: Make sure to quickly get out from the Monolith once your ammunition is refilled. Also, when The General goes invisible, just use your Aura View to see him.
Defeating Wei Lu - Master of Illusion
Use PK on the statues then shoot them. After you destroy all the statues, Wei Lu will transform into a huge three-headed dragon. Destroy all three heads to defeat her. It is best to go to the back of the room and use the assault rifle if possible.
Elevator music
On the level with Wei Lu, while you are in the elevator the music playing sounds like "With My Mind" by Cold.
Fusion Tower Shut Down
In the Fusion Tower, there are four rooms: K-1, K-2, K-3 and K-4. The goal of this puzzle is to hit these switches in order. Each room contains one switch. You need to flip all four of these switches to overload the fusion reactor and move on to the next area. Okay. You start off in room K-1, but don’t hit this switch! They must be flipped in this order:
K-3
K-2
K-4
K-1
Now, while you stay hidden in K-1, mind-control a bad guy and have him run to room K-3, then to K-2 and finally to K-4. You're psi-energy will drain pretty fast while you're doing this, and of course with every switch you flip, the fusion blast becomes faster and more powerful, so be patient. It takes practice, but you'll get it. After the first three are down, all you have to do is flip the last switch in K-1 and you're done! But watch out for the meat-puppet soldiers that come charging in the room. Dispose of them (and anybody else that gets in your way) and run to room K-3. A door has now been unlocked.
In the Fusion Tower,I found that fliping the switches in the order of K-1, K-4, K-2, K-3 also works to shutdown the reactor. I realize that is the reverse of anothers suggestion, but this way you don't have to worry about the people in the reactor chamber trying to kill you. Also, this way you don't waste as much Psi-energy if you flip the first two switches yourself, go to K-3 and Mind Control a guy to flip K-2 for you.
Mind Control Suicide
Click Left Analog-stick + Right Analog-stick while controlling someone else's mind.
More Psi energy
Sneak up on an guard and use the Mind Drain power. You can almost fill your Psi bar up when it is completely empty. Anytime you get to a checkpoint and are short on health or energy, save the game. Reload it to get full health and energy.
Sneak Peak
Note: this cheat works only for the demo. In the first demo mission after killing the three guards in the second area press the red button turning off the lasers at the next door go through the door then you will see another door in that hallway.
When you try to open it, it says "door locked for demo" simply use remote view (up on D-pad) and you can pass through the door and explore what the actual game's first level contains.
Unlock Bonus costumes
Barrett: Successfully complete the game under the elite difficulty setting.
Burnt soldier: Successfully complete the game under the normal difficulty setting.
Dockworker: Successfully complete the game under the easy difficulty setting.
Dragon Wei Lu: Successfully complete the game on hard difficulty setting.
Clown General: Collect all six orbs in the General Boss battle.
General: Successfully complete the game under the elite difficulty setting.
Jack: Successfully complete the game under the elite difficulty setting.
Jov: Successfully complete the game under the elite difficulty setting.
Komiko: Successfully complete the game under the normal difficulty setting .
Labcoat: Successfully complete the game under the easy difficulty setting.
Leather Marlena Pyro: Successfully complete the game under the elite difficulty setting.
Marlena Pyro: Successfully complete the game under the elite difficulty setting.
MP1: Successfully complete the game under the easy difficulty setting.
MP2: Successfully complete the game under the normal difficulty setting.
MP3: Successfully complete the game on hard difficulty setting.
Sara Psi: Successfully complete the game on hard difficulty setting.
Sara Suicide: Successfully complete the game on hard difficulty setting.
Sara: Successfully complete the game under the normal difficulty setting.
Stealth Nick: Successfully complete the game under the elite difficulty setting.
Tonya: Successfully complete the game on hard difficulty setting.
Training Nick: Successfully complete the game under the easy difficulty setting.
UN Soldier: Successfully complete the game under the easy difficulty setting.
Urban Nick: Successfully complete the game under the normal difficulty setting.
Wasteland Nick: Successfully complete the game on hard difficulty setting.
Wei Lu: Successfully complete the game under the normal difficulty setting.
Unlock Bonus missions
Aura Pool: Find the Gnome in level 8.
Floor of Death: Find the Gnome in level 4.
Bottomless Pit: Find the Gnome in level 4.
Bouncy Bouncy: Find the Gnome in level 2.
Gasoline: Find the Gnome in level 6.
GearShift: Find the Gnome in level 3.
Panic Room: Find the Gnome in level 3.
Psi Pool: Find the Gnome in level 6.
Stop Lights: Find the Gnome in level 7.
Survival Mode: Find the Gnome in level 3.
Tip The Idol: Find the Gnome in level 1.
TK Alley: Find the Gnome in level 2.
Up And Over: Find the Gnome in level 4.
Gnomotron: Find all Gnomes in the game.