Medals are achieved doing certain objectives in single player and multiplayer mode.

Conqueror Supreme Team victory on every map. Galactic Master Beat the computer in a Galactic Conquest scenario. Galactic Overlord Beat all Galactic Conquest scenarios. Hero Vanquisher Deliver the final blow to 10 heroes. Saboteur Destroy 5 capital ships. Survivor Use an escape pod when a capital ship is about to explode. System Eliminator Destroy 15 ship systems.

Medal	How to unlock
Capture Master (Bronze)	Capture 10 command posts.
Capture Master (Gold)	Capture 50 command posts.
Capture Master (Silver)	Capture 25 command posts.
Conqueror (Bronze)	Be on the winning team 5 times.
Conqueror (Gold)	Be on the winning team 30 times.
Conqueror (Silver)	Be on the winning team 15 times.
Flag Carrier (Bronze)	Capture 5 flags.
Flag Carrier (Gold)	Capture 30 flags.
Flag Carrier (Silver)	Capture 15 flags.
Jedi Master (Bronze)	Reach 25 kills as a hero.
Jedi Master (Gold)	Reach 150 kills as a hero.
Jedi Master (Silver)	Reach 75 kills as a hero.
Multiplayer Maverick (Bronze)	Reach 25 kills in Multiplayer.
Multiplayer Maverick (Gold)	Reach 150 kills in Multiplayer.
Multiplayer Maverick (Silver)	Reach 50 kills in Multiplayer.
Rogue Leader (Bronze)	Reach 10 kills in a starfighter.
Rogue Leader (Gold)	Reach 100 kills in a starfighter.
Rogue Leader (Silver)	Reach 25 kills in a starfighter.
Sith Lord (Bronze)	Kill 10 enemies using Force Lightning or Force Choke.
Sith Lord (Gold)	Kill 50 enemies using Force Lightning or Force Choke.
Sith Lord (Silver)	Kill 25 enemies using Force Lightning or Force Choke.
Tank Buster (Bronze)	Destroy 10 enemy vehicles whilst on foot.
Tank Buster (Gold)	Destroy 50 enemy vehicles whilst on foot.
Tank Buster (Silver)	Destroy 25 enemy vehicles whilst on foot.