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.
Finish the game.
Get the so-so ending.
Complete Katharine's storyline.
Complete Mr. Brown's storyline.
Complete Mabel's storyline.
Complete the nurse'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 good ending.
Don't kill anybody.
Kill everyone.