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