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