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