Cheat: Select all Planets:
Go to "Historical Campaign" mode (in single player) Select the Era you want to play (Clone Wars or Galactic Civil War). You should now be on the Planet Selection screen.
Hit: SQUARE, CIRCLE, SQUARE, CIRCLE
You can now scroll Left/right thru all the planets

Unlockable: Artwork:
Naboo Stills: Beat the Naboo-Rebellion on Theed Mission in Historical Campaigns: Clone Wars.
Star Wars Battlefront Art: Beat the Kashyyyk-Aggressive Negotiations Mission in Historical Campaigns: Clone Wars.
Geonosis Stills: Beat the Geonosis-Battle of Geonosis Mission in HistoricalCampaigns: Clone Wars.
Kamino Storyboards: Beat the Kamino-Assault on Kamino Mission in Historical Campaigns: Clone Wars.
Weapons and Units Stills: Beat the Rhen Var-Mountaintop Defenses Mission in Historical Campaigns: Clone Wars.
Tatooine Concept Art: Beat the Tatooine- Siege of Mos Eisley Mission in Historical Campaigns: Galactic Civil War.
Yavin Concept Art: Beat the Yavin 4-The Fall of Yavin 4 Mission in Historical Campaigns: Galactic Civil War.
Hoth Concept Art: Beat the Hoth-Battle of Hoth Mission in Historical Campaigns: Galactic Civil War.
Bespin Concept Art: Beat the Bespin-The Liberation of Cloud City in Historical Campaigns: Galactic Civil War.
Endor Stills: Beat the Bespin-Battle in the Clouds in Historical Campaigns: Galactic Civil War.

Unlockable: Maps For Instant Action:
Beat missions in Historical Campaigns to unlock them for Instant Action.
Hint: Blaster Rifle Head Shots
The accuracy of the infantry's blaster rifle decreases dramatically the longer you shoot. However, the first 3-4 shots will almost always be dead on target, making it a deadly snipe tool even over moderately long distances if you keep the bursts short. A great benefit that comes from sniping with the blaster rifle is the rapid fire which can give you up to three head shot points per kill if you're aim is on. For these reasons, selecting the sharpshooter is really only necessary for sniping over really long distances. On most battlefields though, the scope on the blaster rifle should suffice, also greatly improving your chances at close encounters.

Unlockable: Artwork: