| Achievement | How to unlock | Points
|
|---|
| A new watcher | Prevent Cthulhu from awakening. | 80
|
| Addicted | Use ten doses of Lichen. | 20
|
| Against the tide | Cross the maze without reassembling the cursed totem. | 40
|
| Artist | Reconstruct Mei's drawing. | 20
|
| Augmented agent | Find all evolutions. | 80
|
| Better than Pandora | Open the door without letting the matter spill out. | 40
|
| Beyond the senses | Using sonar, reveal the invisible tentacles of the citadel's guardian. | 40
|
| Cosmic Abyss | Replace the watcher. | 80
|
| Cthulhu fhtagn | Translate the temple inscriptions. | 20
|
| Elementary | Solve fifteen deductions. | 20
|
| Full charge | Find all energy upgrades. | 80
|
| His master's voice | Reach the star without killing the guardian. | 40
|
| In deep waters | Restore the seal and destroy the deep one. | 40
|
| Inspector | Find ten sub-clues by inspecting objects. | 20
|
| Let there be light | Reactivate the PIT station. | 20
|
| Linguist | Translate the language of the great race of Yith. | 40
|
| Macro waves | Reveal twenty-five different clues using sonar frequencies. | 20
|
| Mens sana | Finish the game without exceeding the corruption threshold. | 80
|
| Open Sesame | Unlock a yith mechanism using sonar. | 40
|
| Thanks Key | Analyze twenty-five clues. | 20
|
| The Awakening | Find Mei in the Other World. | 20
|
| The Citadel | Get the Star of Shamash. | 20
|
| The Excavation | Cross the maze. | 20
|
| The Last door | Reach the prison. | 20
|
| The Other World | Leave the Other World. | 20
|
| The Temple | Escape from the deep one. | 20
|
| Where am I? | Teleport using the Star of Shamash. | 40
|