| Achievement | How to unlock | Points
|
|---|
| - Finish the second chapter.
| |
| - Finish the final chapter.
| |
| - Collect all letters and notes in your diary in all chapters in a single playthrough.
| |
| - Complete all sketches in your diary in all chapters in a single playthrough.
| |
| - Finish the first chapter.
| |
| - Finish the seventh chapter.
| |
| - Infiltrate Borgia's hideout in the fourth chapter.
| |
| - Find a sketch of a secret passage in the fifth chapter.
| |
| - Pick up the stepladder in the seventh chapter.
| |
|
| - Inspect a suspicious letter at the first opportunity.
| |
| - Use the letter opener in the first chapter without using the Oculus Perpetua.
| |
| - Find a new notebook in the first chapter.
| |
| - Finish the fourth chapter.
| |
| - Finish the game in under five hours.
| |
| - Put out the flames of the past in the eighth chapter.
| |
| - Finish the game in under eight hours.
| |
- I Could Do This Blindfolded
| - Break into the pope's study in the fifth chapter without using the Oculus Perpetua.
| |
| - Find every possible death in the safe minigame in the fourth chapter.
| |
| - Finish the fifth chapter.
| |
| - In the Zodiac minigame, arrange Sagittarius discs on the left and Capricorn discs on the right.
| |
| - Block the rats from getting into the catacombs in the first chapter.
| |
| - Finish the eighth chapter.
| |
| - Find a uniquely mysterious place and record it in your diary in the final chapter.
| |
- Short History of Time Travel
| - Read the final, complete version of Giacomo's Chronicle in the main menu.
| |
| - Finish the game in under eleven hours.
| |
| - Shoot all the required targets in the second chapter.
| |
| - Finish the third chapter.
| |
| - Complete all diary-related achievements in a single playthrough.
| |
| - Finish the sixth chapter.
| |
| - Complete all records in your diary in all chapters in a single playthrough.
| |
