Full list of all 47 Astronarch achievements.
The base game contains 41 achievements, and there are 3 DLC packs containing 6 achievements.
Defeat the Hydra.
Defeat an act without visiting a merchant.
Unlock the Bloodmage.
Sell an ability orb and 2 potions to the same merchant.
Use 3 potions in one combat.
Defeat the Deep Fiend.
Unlock the Illusionist.
Equip 3 of the same item to a hero.
Have 500 Gold at one time.
Unlock the Druid.
Sell 10 items or potions to the same merchant and then defeat the act.
Defeat the Blighted Hag.
Defeat the Beast of the Weald.
Beat the game without losing a battle.
Unlock the Ranger.
Defeat an act after visiting at least 7 events.
Beat the game without using a potion.
Defeat the Mercenary Crew.
Unlock the Fiend.
Defeat a boss with 1 hero remaining.
Unlock the Outlaw.
Defeat a boss with all heroes at full HP.
Defeat the King.
Have 50 negative effects on an enemy at one time.
Unlock the Alchemist.
Defeat the Balrog Spawn.
Have 50 positive effects on a hero at one time.
Have 50 Morale at one time.
Defeat the Executioner.
Unlock the Ronin.
Defeat the Timeworn Golem.
Unlock the Brawler.
Emerge victorious in 10 combats during a single act.
Unlock the Bard.
Defeat all 3 elites during a single act.
Beat the game without any abilities upgraded.
Beat the game in under 30 minutes.
Gain a level on every hero.
Defeat an elite without any items equipped.
Defeat Corruption 10.
Defeat Corruption 20.
Unlock the Fallen.
Defeat the Omen of Burden with the special item fully upgraded.
Defeat the Omen of Frailty without any items breaking.
Defeat the Omen of Doom without triggering its effect once.
Defeat the Omen of Loss without taking the special blessing.