Star Wars: Battlefront cheats and cheat codes for Playstation 2

Unlock all planets
Choose Historical Campaign and at the planet selection screen press 
the following: Square, Circle, Square, Circle 

Unlock Baby Wars mode
Type "Jub Jub" as yor profile name. The code is case-sensitive.
All of the soilder will be baby size.

Infinite health or ammunition
Lay near any one of the replenishment depots. 
Camp there with a sniper rifle and keep firing.

Unlock instant action missions
Finish a mission in historical campaign mode

Naboo Bacta Tanks:
In Galactic Conquest, the Naboo Bacta Tanks are very effective when used by the 
CIS. The Droidekas will regain most of their health while their shields are up, 
making them even more difficult for opponents to destroy. 

Unlockable concept arts:
Finish the indicated missions to unlock concept images:

Bespin: Complete Bespin - The Liberation of Cloud City mission
Endor Stills: Complete Bespin - Battle in the Clouds mission
Geonosis Stills: Complete Geonosis - Battle Of Geonosis mission
Hoth: CompleteHoth - Battle of Hoth mission
Kamino Storyboards: Complete Kamino - Assault On Kamino mission
Naboo Stills: Complete Naboo - Rebellion On Theed mission
Star Wars Battlefront Art: Complete Kashyyyk - Aggressive Negotiations mission 
Tatooine: Complete Tatooine - Siege Of Mos Eisley mission
Weapons and Units Stills: Complete Rhen Var - Mountaintop Defenses mission
Yavin: Complete Yavin 4 - The Fall of Yavin 4 mission