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