Here is the full list of all 42 LEGO Star Wars: The Complete Saga achievements worth 1,000 gamerscore.
Finish Episode VI in story mode.
Play through an entire level online
Get 100 points in Arcade Mode
Perform 20 unblockable combo attacks.
Perform 200 blaster character dodges.
Disable 5 Droidikas with R2D2.
Finish Cloud City still wearing a Helmet.
Shoot First
Revenge: Destroy Darth Vader with Obi-Wan.
Revenge: Destroy The Emperor with Kit Fisto.
Revenge: Destroy The Emperor with Mace Windu.
Crossover: Destroy The Emperor with Darth Maul.
Crossover: Destroy Jango Fett with Boba Fett.
Crossover: Destroy Anakin with Vader.
Complete the game to 100%
Collect all available Gold Bricks.
Collect all mini-kits.
Collect all available red bricks.
Max out the stud counter.
Unlock all characters.
Set off all three Discos.
Wear Every Hat.
Ride all mounts types & ride-ons.
Death Star Trench Run without Firing.
Sell your landspeeder to the Jawas.
Destroy 10 characters with one thermal detonator.
Finish Episode V in story mode.
Revenge: Destroy Anakin with Dooku.
Finish Episode IV in story mode.
Destroy 50 TIE fighters.
Destroy 300 stormtroopers.
Pull 25 arms off other characters.
Finish Episode III in story mode
Make 100 Build-its throughout the game.
Finish Episode II in story mode.
Destroy 5 people with one attack (Jedi super slam).
Perform 200 perfect lightsaber deflections.
Destory 300 droids.
Finish Episode I in story mode.
Revenge: Destroy Darth Maul with Qui-Gon.
Start a Cantina Fight with 50 casualties.
Break Jar Jar 20 times.