Psi-Ops: The Mindgate Conspiracy/PSI Cheats

To enter cheat mode go to the main menu, highlight the Extra Content option and press to display the Password Entry screen. 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.

Mind control suicide
While controlling someone else's mind, click +. For the mind control suicide to work, you must hold +  for several seconds. After awhile, the enemy will start to kneel. After he kneels, you can exit his body, but he will still commit suicide.

Levitate yourself
To levitate yourself in a way, get on to an object that you can levitate, such as a box. Aim down and hold to lock on. Press, and the box will levitate with you on it. To go higher, keep holding and press continuously at the correct time. You should get progressively higher. This is useful for getting to high and far places. In order to levitate from the ground, stand on any object such as a crate, barrel, bench, etc. Perform the TK ability while standing on the object. Make sure that the crosshair is lined on the object. You will begin to levitate with the object with the as if you were controlling an object from afar. Make sure that the object is not a wooden crate or an explosive barrel, as they are fragile to gunfire and other objects. This tactic can be used to make the "drop" on enemies below. The only problem is that you cannot use any other mind powers.

Instant kill
To instantly kill someone with a shotgun without having to aim at their head, use TK to levitate them as high as possible without multi levitating. Walk almost, if not directly under them, and fire the shotgun. It should automatically aim at their head and blast it off.

More Psi energy
Sneak up on a guard and use the Mind Drain power. You can almost fill your Psi bar up when it is completely empty. Any time you get to a checkpoint and are short on health or energy, save the game. Reload it to get full health and energy. You can also simply Mind Drain anyone to regain Psi Energy. You need to have at least a little Psi energy for this to work, or enough to get someone on their back. Use Telekinesis to throw him down and Mind Drain when he is about to get up. If you want a more gruesome death, wait until he is just about to get up and his head will pop, just like an ordinary Mind Drain at the end. If you cannot sneak up to an enemy and drain him, throw him at a wall, object, or the ground. When he starts to get up, use Mind Drain. This will almost fill you Psi Energy completely if you are empty.

Special skin abilities
Some of the character skins have special abilities. For example, there are masters of Psi powers such as Barret, Pyro, and Lenov. They can do many more things than Nick with their powers. If you were to unlock their skins, you will also get those abilities.
 * Edgar Barret: Can carry all MPs, has the ability to carry very heavy objects (boxcars, trains, crates, etc.; preferably in the Barret boss fight), Psi drains slower than usual.
 * Jov Lenov: Can Mind Control anyone, can make anyone commit suicide at any time, Psi drains slower than usual.
 * Marlena Pyro Skin: Her Pyrokinesis can burn faster, fire goes through most objects or until it hits a wall, Psi drains slower.
 * The General Skin: Has all the powers listed above.

Elevator music
On the level with Wei Lu, while you are in the elevator the music playing sounds like "With My Mind" by Cold.