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.
Tower vision puzzle solved.
The garden has found life.
Garden vision puzzle solved.
The mechanisms of the tower are back in operation.
The torch of the lighthouse burns brightly once more.
Lighthouse vision puzzle solved.
All six tower runes collected.
All six garden runes collected.
Final seal unlocked.
Secret ending discovered.