Note:-  This cheat is also known as Obi-Wan

Level select:-
Select the "New Game" option at the main menu, then enter GREYTHERAT as saved game name. All levels, including the bonus levels, will be unlocked. Enter M1A2U3L4!? as a saved game name to unlock all levels until Darth Maul.

Easy Jin'hah Defeat  -  On Secrets of Black Heth level an easy way to destroy them is to get them by a ledge and use Force Push (left trigger then y).

Easy way to kill Darth Maul  -  The only easy way to kill Darth Maul is to stay as far away from him as you can before he strikes down at you move out of the way when he does this and counter attack him with a force manouvre of your own( mine is the turn spinning saber strike) hold r and use the analogue stick. to beat the timer you have to be very good and know darth maul's weak points to kill him quickly. 

Slow motion:
Hold L for about one second, then press White. Slow motion will only work for several seconds.

Battle Royal mission:
Defeat Darth Maul in level 25 to unlock the Battle Royal mission, where you have to fight eight other Jedi Masters in the Saber Arena.

Additional versus mode characters:
Defeat a character in the Jedi Arena during game play to unlock him or her in versus mode.

Informant: Bypass enemies:-  Start the level and go down the first elevator. When it opens, go to your left and move onto a landing hanging off the building. Then, go to the end of it and look to your right. Fall onto the landing there (look down). Then, go onto the slanted part of the building on your left. Next, run straight along the side then jump back unto the straight landing. Go into the room and take out the enemies guarding the elevator. Press the button and go in. This helps bypass enemies and saves time. When you get out of that elevator, there will be an enemy with a blaster on the left.

Informant: Millennium Falcon:-  When you start the mission, turn very slightly to the left. You will see a dome-shaped building in the distance. Use your binoculars and zoom in slightly. A few minutes you will see the Millennium Falcon fly towards it.

Informant: Chancellor Velorem:-  Look at the background for about a minute to see an open top ship flying in a circle around the construction site. On the ship is Supreme Chancellor Velorem and a woman, piloted by a Trade Federation Droid.

The Shadows of Coruscant: Wookie help:-  In the introduction to the first level you will see a Wookie resembling Chewbacca walk past Obi-Wan. When the level starts, turn around and walk back the way the Wookie walked. You will eventually see the Wookie standing beside a fire. Walk up to the Wookie and talk to him with Action or Y. Then, continue through the level and the Wookie will follow and will assist you in taking out the Black Heth Thugs.

On the first level, The Shadows of Coruscant, go to the right when you begin the level. You will find a Wookie standing there. If you begin to slash the Wookie, who looks strangely like Chewbacca, he will begin to attack you. If you continue to attack him, you will notice that your swings no longer affect him. He will begin to follow you around and attack enemies. He can be quite helpful when dealing with pesky enemies, and during the Boss fight at the hover train.