Here is the full list of all 27 The Little Acre achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Beat the game in less than 1 hour
Tried to lose the cavity magnetron
Ask for a solution
Ok, we get it
Only placed the orb once
Solved the dance puzzle on your 1st try
Where did you get that pattern?
Didn't ask for any hints
Complete The Little Acre
Didn't ask for any solutions
Gave Merr wanted he wanted… sort of
Saved Aidan
Found Arthur
Overcome hurdles at the dam
Ruined lunch
Made a new friend
Helped Merr fix a machine and return home
Apparently you’re ready for this jelly
Attacked the swamp monster in less than 5 seconds
Travelled to Clonfira as Lily
Took out the informant
Travelled to Clonfira as Aidan
Make breakfast
Distracted Dougal once only
Let Dougal take the blame
Got the generator working
Get dressed without waking Lily