Here is the full list of all 28 A Sceptic's Guide to Magic achievements.
Cast the Tranquility spell.
Cast the Bloom spell
Cast the Astral Projection spell
Dispose of the threat.
Neutralise the threat.
Everybody deserves a second chance.
Respect the law.
Cast the Harmonious Diffusion spell.
Cast the Temporal Glaciation spell.
Cast the Dispel Transparency spell.
Meet a nasty end.
Rest in peace.
Cast the Perdurable Binding spell.
Cast the Horologist's Hindsight spell.
Cast the Hydrophobic Locomotion spell.
Cast the Constitutional Transmogrification spell.
Cast the Spontaneous Deconstruction spell.
Cast the Beneficial Fortuity spell.
Cast the Veracious Compulsion spell.
Cast the Luminous Personage spell.
Cast the Impermanent Dematerialisation spell.
Cast the Psychoscopic Perception spell.
Cast the Spontaneous Regeneration spell.
Drink the Initiate's Brew.
Cast the Contact spell.
Cast the Shadow spell.
Cast the Portal spell.
Cast the Compliance spell.