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