Here is the full list of all 23 Moons of Madness achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Help your mother
Follow your destiny
Refuse your mother
Launch the ship
Start the machine
Open the Gate
Finish chapter two
Reveal the Dreamer
Finish Secret Keepers
Farewell, Inna
Reach the greenhouse without running out of air
Create a strong poison
Create a weak poison
Escape the sand storm
Fix the satellite
Maybe try going around the water
Finish chapter one
Speak the three words
Corrupt an orb
Escape the thing in the mist
Fix the reclaimer
Bring solar array back online
Wake up from the nightmare