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