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