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