Here is the full list of all 13 Northmark: Hour of the Wolf achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Find and open all chests
Be chanpion in all arenas
Collect 40 cards
Find all secret places
Get 50.000 gold
Win 25 battles
Explore 25 locations
Reach the 10th level
Win at least 1 arena
Hit opponent with power of 15 or more
Opet at least 1 chest
Hit oponent with power of 7 or more
Find at least 1 secret place