Here is the full list of all 25 Astrologaster achievements.
Complete Simon Forman's storyline.
Complete Thomas Blague's storyline.
Complete Alice Blague's storyline.
Complete Emilia Lanier's storyline.
Complete Emma Sharpe's storyline.
Complete Humphrey Bell's storyline.
Complete Lancelot Moore's storyline.
Complete Robert Devereux's storyline.
Complete Ricardo Ferraro's storyline.
Complete Sybil Fortescue's storyline.
Complete John Whitgift's storyline.
Complete Mary Payne's storyline.
Complete Nicholas Mugg's storyline.
Complete Avis Allen's storyline.
Win a medical licence.
Complete the game.
Recieve one letter of recommendation.
Recieve two letters of recommendation.
Recieve three letters of recommendation.
Recieve four letters of recommendation.
Recieve five letters of recommendation.
Recieve six letters of recommendation.
Recieve seven letters of recommendation.
Recieve eight letters of recommendation.
(gasp!)