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.
Release the hidden Garden Friend.
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.
Super Silly Crow is defeated.
A Garden Friend is hiding in the Esky.
A sneaky stowaway Garden Friend.
Friends apart, memories remain.
Arina really shouldn't be pressing buttons.
A Cosmic Garden Friend phones home.
Pluck the moon right out of the sky.
A Garden Friend gums up the pipes.
Arina’s at the end of her rope.
Saw the plank. Next, get a hammer.
What's under the table cloth?
Restore the board to a clean state.