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