Here is the full list of all 34 Liminal achievements.
Complete 1 Calm experience.
Collect 1 Daily Credit rewards.
Unlock 1 experience.
Log in with a user account.
Complete the Awe experience, Boundless.
Complete the Awe experience, Descent.
Complete the Calm experience, Above the Clouds.
Complete the Calm experience, Hypnosis.
Complete the Calm experience, Light Rain.
Complete the Calm experience, Ripple Effect.
Complete the Calm experience, Sublime Blue.
Complete the Energy experience, Splat.
Complete the Energy experience, Ion.
Complete the Pain Relief experience, Relief Point.
Complete 10 Calm experiences.
Complete 1 Energy experience.
Complete 10 Energy experiences.
Complete 1 Awe experience.
Complete 10 Awe experiences.
Complete 1 Pain Relief experience.
Complete 10 Pain Relief experiences.
Complete 1 Lab experiment.
Complete 10 Lab experiments.
Complete 30 experiences.
Earn 2500 credits.
Collect 10 Daily Credit rewards.
Collect 50 Daily Credit rewards.
Unlock 10 experiences.
Unlock 1 Favourites slot.
Unlock 3 Favourites slots.
Add 1 experience to Favourites.
Add 5 experiences to Favourites.
Use the pulldown/settings menu.
Visit all 5 arenas.