Here is the full list of all 26 Strayed Lights achievements.
Survive your inner conflict
Discover the crossroads
Adapt to a new form
Take your first steps
Soothe a sibling in a forest
Soothe a sibling in a canyon
Soothe a companion
Soothe a stuck sibling
Soothe a sibling lost in a dream
Grow stronger
Reach the climax of your journey
Free
Unlock the potential of one of your abilities
Reach maximum affinity with energy
Unlock all skills
Reactivate an unknown item
Reactivate all unknown items
Obtain all trophies
Chain 6 successful parries
Chain 4 perfect parries
Defeat a boss without taking damage
Interact multiple times with siblings
Imprint a picture in your mind
Find all the siblings you soothed
Find a sibling trapped in a dream
Pet creatures in the forest