Here is the full list of all 16 Greyfox RPG achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Have Esmeralda arrested.
Get the bad ending.
Kill everyone.
Get the good ending.
Don't kill anybody.
Finish the game.
Get the so-so ending.
Complete Mabel's storyline.
Have tea bags dumped on you.
Complete Katharine's storyline.
Save all of Katharine's cat.
Complete the nurse's storyline.
Complete Mr. Brown's storyline.
Knock down and eat a coconut.
Clean up all the dog poop.
Commit two acts of theft.