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