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