Bombardment Ability
The sniper's recon droid has the bombardment ability. Use the recon droid to infiltrate heavily guarded areas and then hold down the left trigger for a few seconds to unleash turbolasers blasts from the sky, capable of annihilating whole groups of enemys.

Ewok Size Characters
Enter the profile name "Jub Jub".

All Planets
From the historical campaign mode (single player), select the era you want (i.e. clone wars or galactic civil war). Now you're in the planet selection screen, press SQUARE, CIRCLE, SQUARE, CIRCLE. You should be able to select any of the planets.

All Maps & Campaigns
From the historical campaign mode (single player), select the era you want (i.e. clone wars or galactic civil war). Now you're in the planet selection screen, press SQUARE, TRIANGLE, SQUARE, TRIANGLE.

How to Kill Jedi Heroes
Just get yourself in a starfighter, x-wing or tie fighter, and land on top of them. You can also have good fun with Jedi heroes if you throw grenades at them, but they're not fatal.