When being attacked by the Starkiller clones, use the lightsaber throwing technique. When you run out of energy, keep jumping and dashing in mid-air over the clones until you have a suitable amount of energy. Then, repeat the lightsaber throwing and continue until the clones die.
Unlock the following costumes by performing the corresponding tasks:
COSTUME - HOW TO UNLOCK Experimental Jedi Costume - Complete the game with "Light Side" Ending Saber Guard Costume - Silver Medal in Cloning Spire Trial The Dark Apprentice's Robes - Complete the game with "Dark Side" Ending Tie Flightsuit - Complete "Kamino The Escape"