Here is the full list of all 11 Kairo achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
All six lighthouse runes collected.
The torch of the lighthouse burns brightly once more.
The mechanisms of the tower are back in operation.
The garden has found life.
All six tower runes collected.
All six garden runes collected.
Lighthouse vision puzzle solved.
Tower vision puzzle solved.
Garden vision puzzle solved.
Final seal unlocked.
Secret ending discovered.