Here is the full list of all 17 Recursed achievements.
Find the way out.
Enter a room that no longer exists.
Arrive nowhere.
Transform 50 ooblecks.
Create an impossible situation.
Instantiate 500 rooms.
Do nothing.
Enter 100 cauldrons.
Hey, this is fun!
Explore a level to a depth of 20 chests.
Unlocked by unlocking the Recursion achievement.
Collect all crystals.
Collect all diamonds.
Collect all crystals and diamonds in The Oobleck Conundrum.
Collect all crystals, diamonds and rubies in The Last Tapestry.