Here is the full list of all 15 Among Trees achievements.
Sleep for 1 night in a tent
Survive for 50 days
Survive a bear attack
Catch 30 fish in total
Create the wormwood brew
Build all cabin extensions
Visit all exploration areas
Catch a northern pike perch
Find every flora type
Harvest a turnip
Sleep for 5 nights in a tent
Survive for 15 days
Cook a meal on the stove
Survive for 1 day
Gather 5 golden chanterelles in one day