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