Psi-powers are special abilities that Psychonauts learn to use. They have a variety of uses such as maneuvering around the world, helping fight enemies, and protecting yourself. You will need to use all of them to complete the game.
You can have three Psi-powers equipped at any one time. These can be mapped to the Right trigger, Black button, and White button (Xbox controller.) You can change these at any time by going into the Psi-powers menu (Back button, or Right on the D-pad), highlighting a power, and then pressing the button you want to map it to.
After a power is set for a button all you have to do is press that button to use it. Some require additional input though.
Levitation is used for level traversal. When you're levitating you'll be able to move quicker, jump higher, and slow your fall to a glide. You can also move over dangerous flooring when levitating, such as fire, or electricity, but not water!
To use levitation, just press whatever button you have it assigned to. You can also use it to glide after a jump by pressing the Left trigger in the air.
Levitation is unlocked by completing Milla's Dance Party and earning the Levitation badge.
Telekinesis allows you to move things with your mind. Not all objects are moveable, for example you cannot uproot trees with your telekinesis, but stand alone objects are freely moveable and tossable.
To use Telekinesis, hold whatever button you set it to, and if there is an object in front of you that it will work on, an hand will grab it and a little arc will appear. You can move the Left joystick to change which direction to toss it. Release the button you were holding to throw the object.
If a thrown object hits an enemy then it will explode and cause damage. If it does not hit an enemy then it will just get thrown to that new location.
If nothing around you is grabbable then Raz will let you know that he "can't get a good grip" and instead of the hand coming out you'll just see a little psychic spark.
Invisibility makes you, well, invisible. To use this power, press the button you have it assigned to and then Raz will go invisible for a short period of time. Once it runs out it will need to recharge before it can be used again.
When invisible, NPCs will not be able to see you. You can use this ability to sneak up on enemies, or sneak into certain places.
Pyrokinesis allows you to set objects on fire, also certain enemies. This power can be both fun and useful. Some enemies say hilarious things when set on fire, and sometimes you need to get something out of your way.
To use this power, hold the button you've assigned it to and whatever you're targetting will start to ignite. You'll see a little thermometer over the thing. It takes a bit of time to light things on fire so make sure you are safe while attempting to use it. When the thermometer is full, the thing will ignite.
If you don't see the thermometer filling up then whatever you're targetting can't be ignited.
Clairvoyance lets you look at the world (and yourself) through other people's eyes. You can use this power on certain objects as well. For example, using it on a crow's feather lets you see through the eyes of the crow.
Looking at yourself through the eyes of others can be pretty entertaining, but this power will also help solve various puzzles in the game.
Confusion works like a grenade that explodes confusion gas. When enemies are "confused" they are basically stunned and you can take some free shots at them.
To use it you tap the button you have it set to and Raz will pull out a confusion grenade (looks like a question mark) and then toss it straight ahead at a set distance (you can't change this.) A few seconds later it will explode and any enemies within distance of the explosion will become "confused" for a short period of time.
The Shield allows you to block attacks, projectiles, lasers, etc. It works by holding down the button you've assigned it to, but it can only last for a set period of time. If you drain the entire shield then it will need to recharge before you can use it again.
This is a psychic energy gun. You will learn to shoot Psi-Blasts out of your head at targets in front of you, or if you hold the 'L Trigger' you can lock on to enemies to blast them. When locked onto an enemy you can use the Right Analog Stick to switch between targets.
This will be your main ranged attack for the game. It will receive a few upgrades including ammo capacity, and ricochet blasts. When enemies are defeated they will often drop "raw energy" (orange exclamation point type things) that you can gather to refill your ammo.