Here is the full list of all 49 Asterigos: Curse of the Stars achievements.
Witness Minerva's Determination
Defeat Eumenides
Upgrade Three Weapons To Max Level
Open All Treasure Chests
Collect All Echoes
Activate All Conduits
Read 250 Discoveries Documents
Upgrade Four Enhancements To Max Level
Complete All Trinity Challenges
Defeat Pallas
Defeat All Teumess
Defeat All Mimics
Defeat Hiems
Defeat Astraix
Defeat Miltos
Defeat Soleucus
Defeat Kavouras
Upgrade An Enhancement To Max Level
Defeat Anagnos
Defeat Doron
Defeat Breathless
Defeat Wassily
Progress To The Event of Trinity
Collect All Scores
Finish Otto's Last Resort Quest
Defeat the Black Warden
Defeat All Hellhounds
Finish the Loser Noble Quest
Finish Bion's Dogtags Quest
Activate the Bridge to the Depths
Upgrade A Weapon To Max Level
Defeat Avatar of Titan
Defeat Marble
Collect At Least 20 Craftable Trinkets
Defeat Andreas
Gain Starlight's Trust
Progress To The Event of The Laurel Craft
Defeat Bion In The Final Training
Defeat Colossi
Read 100 Discoveries Documents
Open 50 Treasure Chests
Defeat Garrison
Defeat Eulalia
Defeat Baraad
Defeat Raveneous
Retrieve All Weapons
Complete All Achievements
Witness Minerva's Sacrifice
Complete A Round of Game With Level 20 or Lower