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