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