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.
Arina throws popcorn at Frendt five times.
Super Silly Crow is defeated.
Friends apart, memories remain.
Arina really shouldn't be pressing buttons.
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 Cosmic Garden Friend phones home.
Pluck the moon right out of the sky.
A Garden Friend gums up the pipes.
A Garden Friend follows on a school trip.
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.