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.
Have Esmeralda arrested.
Knock down and eat a coconut.
Commit two acts of theft.
Finish the game.
Get the so-so ending.
Complete Katharine's storyline.
Save all of Katharine's cat.
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.