Here is the full list of all 18 Baba Is You achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Really beat the game.
Complete the garden.
Complete a secret area.
Complete the world map.
Complete the space area.
Complete the abstract area.
Complete the forest.
Complete the cavern.
Complete the forest of fall.
Complete the mountain.
Complete the ruins.
Beat the game.
Find an orb.
Complete the solitary isle.
Complete the lake.