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