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