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.
Get the good ending.
Don't kill anybody.
Knock down and eat a coconut.
Get the bad ending.
Kill everyone.
Save all of Katharine's cat.
Commit two acts of theft.
Finish the game.
Get the so-so ending.
Complete Katharine's storyline.
Have Esmeralda arrested.
Complete the nurse's storyline.
Complete Mr. Brown's storyline.
Complete Mabel's storyline.
Have tea bags dumped on you.
Clean up all the dog poop.