Here is the full list of all 22 Aurora Dusk Demo achievements.
Meet Devourer
Meet a protectress
Meet Roxanne
Meet a protector
Meet Shadowgate
Meet Marshwald
Kill 1000 zombis
Reach level 100
Win a custom game
Control at least 50 units
Reach level 10
Win a skirmish game
Save the city of Aurora
Defeat a minotaur
Meet Gwidion
Meet Xcillia
Meet Kerringer
Activate 'auto' mode
Meet Bear Claw
Meet Kalzehire
Equip a "solaris diadem"
Equip a rifle