Here is the full list of all 39 Star Wars Jedi: Fallen Order achievements worth 1,000 gamerscore.
Completed the story
Scanned all enemy types
Opened the Vault
Found all of BD-1's encrypted logs
Sliced an oggdo's tongue
Defeated 20 enemies with explosives
Completed all of BD-1's holomaps
Collected all chests and secrets
Have a fully grown terrarium
Recruited all possible crew members for the Mantis
Defeated a former Jedi Master
Hit a single enemy with all lightsaber types
Unlocked all Jedi skills
Crafted a lightsaber of your own
Found all of BD-1's stim canisters
Defeated four mysterious creatures
Defeated the winged terror on Dathomir
Defeated 25 enemies while they are under the effect of Empowered Slow
Discovered 75 Force Echoes
Defeated an enemy with their own Slowed blaster bolt
Explored the crashed Venator
Defeated an enemy using only kicks
Precision Evaded 100 attacks
Defeated 3 enemies using a single lightsaber throw
Defeated each type of Bounty Hunter
Defeated the Ninth Sister
Defeated an enemy with a hacked droid
Completed the Tomb of Miktrull
Sent 25 enemies over the edge
Customized the look of Cal, BD-1, and the Mantis
Defeated an enemy by colliding them with another enemy
Freed the Wookiees from Imperial imprisonment
Parried 100 enemies
Defeated 50 enemies with reflected blaster bolts
Completed the Tomb of Eilram
Kicked a phillak that has kicked you
Discovered the Bogano Vault
Fully customized your lightsaber
Joined the crew