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