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