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