Here is the full list of all 21 Age of Fear: The Undead King achievements.
Upgrade any unit to Elite!
You have helped farmers to get rid of wolves!
Help Sir Edward's to hunt his prey!
Sir Edward became Black Knight!
Your hero has been hurt! Please don't cry!
You have been defeated!
Raise your own bone dragon!
Find frozen dwarven army!
Complete Rise of The Necromancer campaign!
Always fresh. Only certified meat!
Take control over enemy!
Complete The Tale of Sir Edward campaign!
Read the whole game guide!
Time is just another dimension!
You have hoarded 10000 Gold coins!
Raise an Undead minion!
Become a dreadful Wight!
Win any campaign on Death Seeker dificulty. Good luck!
Trick or treat!
Discover an ancient tribe of Snowmen!
Upload your first Workshop Item!