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 Mr. Brown's storyline.
Complete the nurse's storyline.
Complete Mabel's storyline.
Have tea bags dumped on you.
Clean up all the dog poop.
Commit two acts of theft.
Complete Katharine's storyline.
Knock down and eat a coconut.
Save all of Katharine's cat.
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.