Here is the full list of all 48 LEGO Star Wars III: The Clone Wars achievements worth 1,000 gamerscore.
Using the Force, take control of a Super Battle Droid and destroy 50 other Droids.
Using the Radio ability, command troops 50 times.
Complete a story level without dying (and no invincibility cheat).
Complete the game to 100% (Single Player Only)
Complete all Bounty missions. (Single Player Only)
Collect all Gold bricks. (Single Player Only)
Win 3 consecutive Arcade Mode Battles.
Convert every system to CIS. (Single Player Only)
On a flying level, land a space ship whilst controlling Lando Calrissian.
Collect all the minikits. (Single Player Only)
Convert every system to the Republic. (Single Player Only)
Deploy 500 Clones.
True Jedi in every level. (Single Player Only)
Complete: 5 Loop the loops, 5 Back flips, 5 corkscrews.
Hijack 20 enemy units in Ground Battles.
Unlock/purchase all 'Clone' characters. (Single Player Only)
Free all villains from the Resolute brig. (Single Player Only)
Overheat and destroy 50 gold LEGO bricks.
Collect all Red Power Bricks. (Single Player Only)
Unlock/purchase all 'Droid' characters. (Single Player Only)
Use Yoda to defeat 5 enemies with one lightsaber throw.
Complete Hostage Crisis.
Have all your party members disguised as Senate Commandos in Hostage Crisis. (Story mode only)
Complete Castle of Doom.
Complete Zillo Beast.
Complete Legacy of Terror.
Complete Weapons Factory.
Complete Defenders of Peace.
Defeat Anakin with Count Dooku
Complete Jedi Crash.
Complete Gungan General.
Destroy an enemy building with a proton torpedo
Complete Battle of Geonosis.
Complete Grievous Intrigue.
Complete Rookies.
Destroy 100 Droids with the Clone Chain-gun.
Land on the Invisible Hand.
Complete Lair of Grievous.
Complete Destroy Malevolence.
Complete Shadow of Malevolence.
Complete Liberty on Ryloth.
Complete Innocents of Ryloth.
Complete Storm Over Ryloth.
Complete Blue Shadow Virus.
Complete Duel of the Droids.
Complete Ambush.
Complete The Hidden Enemy.
Complete Geonosian Arena.