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’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.
A sneaky stowaway Garden Friend.
A Garden Friend is hiding in the Esky.
Super Silly Crow escapes the TV.
A Garden Friend sneaks a look.
A Garden Friend follows on a school trip.
A Garden Friend gums up the pipes.
A Cosmic Garden Friend phones home.
Friends apart, memories remain.
Arina throws popcorn at Frendt five times.
Release the hidden Garden Friend.
Pluck the moon right out of the sky.
Arina really shouldn't be pressing buttons.