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
Ask for a solution
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
Tried to lose the cavity magnetron
Made a new friend
Ruined lunch
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
Ok, we get it
Took out the informant
Only placed the orb once
Travelled to Clonfira as Aidan
Make breakfast
Distracted Dougal once only
Solved the dance puzzle on your 1st try
Let Dougal take the blame
Got the generator working
Where did you get that pattern?
Get dressed without waking Lily