Here is the full list of all 27 Aurora Dusk: Steam Age achievements.
Equip a rifle
Equip a "solaris diadem"
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
Meet Aelfyr
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