Here is the full list of all 42 Chorus achievements.
Achieve full mastery of combat
Achieve full mastery of Rites
Finish the game
Travel into the Rift that's consuming Nimika Prime
Kill 3 enemies with a Tier 3 missile's radiation cloud
Achieve full mastery of weapons
Overcharge your energy bar by using the Tier 3 laser weapon
Unlock Nara's full potential by obtaining all Rites
Use the Rite of Control to smash two ships into each other
Stop the carnage at Silva Haven and bring Elder Syrys to justice
Kill 75 enemies while controlling a Spirit-class ship
Use the Rite of the Star to spear two enemies in one go
Learn more about Forsaken's secret past and teach a former mentor a lesson
Meet an unexpected ally and escape alongside him
Catch a glimpse of the past and witness the Prophet's ritual
Face your guilt and obtain the Rite of the Star
Destroy the Faceless entity inside the Amarok Rift
Destroy 5 enemies by disrupting them with the Rite of the Storm
Destroy a Demon-class battleship and enter the Faceless Void
Recruit an engineer at Rinak Haven
Dissolve the lightning storm surrounding the Trom Shipyard and free the Cpt. Aystan and his ships
Finish 35 side missions
Liberate Maka Haven
Learn more about Forsaken's origin at the lab
Find 25 memories
Visit 50 locations
Obtain the Rite of the Storm inside the Amarok Temple
Defeat the Sage and reclaim the Najara jump gate
Kill a total of 50 enemies while drifting
Kill 3 enemies in one drift
Avenge the fallen and guide a civilian convoy to safety
Use a repair drone while having less than 10% HP
Obtain a missile launcher
Use the Rite of the Hunt to leap at an enemy and destroy it within 5 seconds
Finish 5 side missions
Reunite with your old friend Forsa
Defeat an armored enemy with a Gatling gun
Repel the Circle forces and defend the Enclave
Win a race
Obtain a laser weapon
Explore the Artok and find a way outside
Die in permadeath mode