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