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.
Bring solar array back online
Wake up from the nightmare
Follow your destiny
Fix the satellite
Launch the ship
Corrupt an orb
Escape the sand storm
Create a strong poison
Speak the three words
Reach the greenhouse without running out of air
Help your mother
Finish chapter one
Open the Gate
Refuse your mother
Fix the reclaimer
Finish Secret Keepers
Reveal the Dreamer
Farewell, Inna
Escape the thing in the mist
Start the machine
Finish chapter two
Create a weak poison
Maybe try going around the water