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