Here is the full list of all 17 The Gardens Between achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Arina really shouldn't be pressing buttons.
A Cosmic Garden Friend phones home.
A Garden Friend gums up the pipes.
A Garden Friend follows on a school trip.
A Garden Friend sneaks a look.
Super Silly Crow escapes the TV.
Arina throws popcorn at Frendt five times.
A Garden Friend is hiding in the Esky.
A sneaky stowaway Garden Friend.
Friends apart, memories remain.
Pluck the moon right out of the sky.
Release the hidden Garden Friend.
Arina’s at the end of her rope.
Saw the plank. Next, get a hammer.
What's under the table cloth?
Super Silly Crow is defeated.
Restore the board to a clean state.