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