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