Here is the full list of all 36 Unbound: Worlds Apart achievements.
Slay the Demon King
Find paradise
Harnessed every world
Talk with all the spirits
Become a master of everything
Step into the dark world
Cleanse the desert core
Discover the truth
Save all the villagers
Save every villager in the desert
Leap over a gate
Activate 30 waypoints
Free the stern Guardian
Speak with both shady mages
Save 30 villagers
Enter the sand village
Cleanse the forest core
Save every villager in the forest
Meet the giant record keeper
Enter the world of sand
Talk with the family friend
Save 20 villagers
Defy gravity to claim a powerful relic
Save 11 villagers
Use strength to claim a powerful relic.
Find a way to reach new heights
Find a way into the abandoned mine
Save 5 villagers
Meet with the old Guardian
Destroy the Eyrie
Use light to claim a powerful relic
Enter the sanctuary
Save a lost villager
Find the first map-maker
Awaken a forbidden power
Witness the beginning of the end