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