Finish the second chapter.
Finish the first chapter.
Finish the third chapter.
Finish the fourth chapter.
Finish the sixth chapter.
Finish the fifth chapter.
Finish the seventh chapter.
Finish the eighth chapter.
Block the rats from getting into catacombs in the first chapter.
Finish the final chapter.
Shoot all the required targets in the second chapter.
Infiltrate Borgia's hideout in the fourth chapter.
Put down the flames in the past of the eighth chapter.
Pick up the step-ladder in the seventh chapter.
Find a new notebook in the first chapter.
Find a sketch of a secret passage in the fifth chapter.
Complete all sketches in your diary in all chapters in a single playthrough.
Find a uniquely mysterious place and record it into your diary in the final chapter.
Complete all records in your diary in all chapters in a single playthrough.
Collect all letters and notes in your diary in all chapters in a single playthrough.
Use the letter opener in the first chapter without using the Oculus Perpetua.
Complete all diary related achievements in a single playthrough.
Burgle into the pope's study in the second chapter without using the Oculus Perpetua.
Find every possible death in the safe minigame in the third chapter.
Read the final, complete version of Giacomo's Chronicle.
In the Zodiac minigame on the astrology counter in the seventh chapter have all Sagittarius discs on the left and all Capricorn discs on the right.
Finish the game in under 11 hours.
Finish the game in under 8 hours.
Inspect a suspicious letter at the first opportunity.
Finish the game in under 5 hours.