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