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