Here is the full list of all 27 Aurora Dusk: Steam Age achievements.
Meet Kalzehire
Meet Bear Claw
Meet Kerringer
Meet Xcillia
Meet Gwidion
Save the city of Aurora
Win a custom game
Win a skirmish game
Defeat a minotaur
Kill 1000 zombis
Reach level 257
Reach level 10
Reach level 100
Equip a "solaris diadem"
Meet Aelfyr
Equip a rifle
Meet the Devourer
Control at least 50 units
Activate 'auto' mode
Equip gunblade
Equip power armour
Meet a protector
Meet a protectress
Meet Marshwald
Meet Roxanne
Meet Shadowgate
Meet Neomenia