Here is the full list of all 23 Mind: Path to Thalamus Enhanced Edition achievements.
Unlock the secret ending.
Finish the level at the shallow sea with 4 mirrors under 90 seconds.
Do maths as a really good spanish singuer did.
Avoid the cani knowledge.
Go through the whole "Badlands 2" level at night.
Find the remains of the closet in the forest
Worship the sacred jam at the rocks.
Find the remains of the bed in the cave
Throw the ball in the cave and cry with it's delicious sound.
Ignore him and avoid the confrontation.
Discover the meaning of the picture in the hall.
Spot the magic flying cow.
Face your memories.
Turn all four mirrors to get to Sophia.
Access the Skyscraper.
At the last confrontation, avoid the Evil Balls of Death.
Defeat the Colossus.
Finish the second level at the woods in less than 60 seconds.
Discover Time.
Discover Rain.
Glimpse the Thalamus for the first time.
Discover Night.
Discover Fog.