All Levels
Unlock all levels: hold R3 and press D-Pad RIGHT, LEFT, RIGHT, DOWN, RIGHT, UP.

Hold in the right stick and use the D-Pad to enter the following codes:
Invincibility: DOWN, UP, LEFT, RIGHT, DOWN, UP.
Force Abilities at Level 3: LEFT, DOWN, RIGHT, UP, DOWN, DOWN.
All weapons: RIGHT, RIGHT, LEFT, LEFT, DOWN, UP.
Skip Stage: UP, UP, DOWN, DOWN, LEFT, RIGHT.
Unlimited Force: UP, DOWN, UP, LEFT, UP, RIGHT.

Infintite Force Power
Hold down the right stick and use the D-Pad to enter UP, DOWN, UP, LEFT, UP, RIGHT

Set Force Powers To Level 3
While playing, press in the right joystick and use the D-Pad to enter LEFT, DOWN, RIGHT, UP, DOWN, DOWN. This cheat does not affect core Force powers.

Multiplayer Invisibility
In Siege mode in multiplayer, select either the Korriban or Desert Rescue map. At the end of each map, there is an arena with a rancor. When you go up to it, he'll most likely pick up and eat you, killing you right away. However, there is a way to survive this.

In order for it to work, you must be a Jedi with Force Protect, which is only on the Rebel side. Go up to the Rancor and let it pick you up. It will hold you there for a couple seconds. When it starts to bring you to its mouth, turn on Force Protect. You will be eaten but still alive.

Now that you're trapped in its body, you can only see the rancor, not yourself. You cannot move around, but you can use your lightsaber. While you're in there, you are protected from enemies, except for missles due to splash damage. You can swing your lightsaber around which hurts the rancor.

When it dies, you will be free again, but you'll notice you can't see your character! Nobody else can either. You, your saber, your force powers, all completely invisible. If someone happens to target you, your name and stuff will appear but it'll look like nobody's there. If you die, you'll respawn back to normal.

Hijacking Speeder Bikes
On the level Meet Contact you will be riding the speeder bikes the whole time. Most of the time when an enemy pulls up next to you you'll just pull out the good old lightsabre and let him have it. Well there is a way to jump onto his bike and throw him off. You travel side by side at the same speed, and you must be going in a straight line. When you are set hold the left thumbstick towards the enemy and press jump. You'll leap off of your bike onto the enemy's shoulders and do a frontflip, tossing the enemy away and landing on the bike. It doesn't work every time and it's not as efficient as using your lightsaber, but it looks a whole lot cooler

Unlimited Force
Push and hold on the right thumbstick and press up, down, up, left, up, right D-pad

All Force Powers
Press and hold the right thumbstick, then press Left, Down, Right, Up, Down, Down on the D-pad

For invinsibility
hold the right analog stick and the press down, up, left, right, down, up on the D-pad

For all weapons
hold the right analog stick and the press right, right, left, left, down, up on the D-pad

For level skip
hold the right analog stick and the press up, up, down, down, left, right on the D-pad