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