Here is the full list of all 8 One Eyed Kutkh achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
All the ends of all the branches reached
Reconciled The Sun with the Moon
Refused to give a man boats three times in a row
Visited a bear three times
Caused a quarrell between The Sun and The Moon
Found all exits of the labyrinth
Saw all dreams
Press the same button four times in a row. That's some dedication!