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