Here is the full list of all 40 PLAYNE : The Meditation Game achievements.
You've meditated for 60 consecutive days — Your are being
You've discovered the fourth chapter of Playne
You've meditated for 60 days
Aurora Borealis lights up your night sky
You've meditated for 30 consecutive days — Your brain is wondering what that silence is
You've discovered the third chapter of Playne
You've meditated for 30 days
You've meditated for 2 hours, you'll start noticing changes now!
Birds have returned to your Playne
You've meditated for 14 consecutive days — Your brain is evolving
You've discovered the second chapter of Playne
You've meditated for 14 days
You've meditated for 7 consecutive days — Your brain is gettin mellow
You've meditated for 60 minutes, you'll start noticing changes soon!
Fireflies have returned to your Playne
You've meditated for 7 days
You've discovered the first chapter of Playne
You've meditated two days in a row and created your first legit streak. Your brain thanks you!
You've completed your first session
You've meditated for 8 Hours, you are building a positive habit!
You've meditated for 24 Hours, the positive habit is building you!
You’ve meditated for 50 hours. Oh, that feels different! You see the benefits!
You've meditated for 100 hours.
You've meditated for 300 hours. You are entering the Playne.
You've meditated for 500 hours. This is a big step! Congratulations!
You've meditated for 750 hours.
You've meditated for thousand hours. Oh my, or, who am I?
You've meditated for 90 consecutive days — Your brain is what silence is
You've meditated for 120 consecutive days
You've meditated for 150 consecutive days
You've meditated for 180 consecutive days — Your brain is at one with silence
You've meditated for 356 consecutive days — Your brain is silence
You've meditated for 90 days
You've meditated for 120 days
You've meditated for 150 days
You've meditated for 180 days
You've meditated for 356 days
Flowers have returned to your Playne
Butterflies have returned to your Playne
You have unlocked evolve mode