Here is the full list of all 25 Newt One achievements worth 1,000 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox One.
Unlock the Parrot Realm
Rite of Passage
Free all Elders
Free the Glacier Elder
Awaken the Glacier Realm
Rescue all 6 Glacier Parrots
Unlock all Outfits
Unlock all 6 Glacier Outfits
Recover the Glacier Wand
Free the Islands Elder
Free the Clouds Elder
Awaken the Clouds Realm
Rescue all 6 Clouds Parrots
Unlock all 6 Clouds Outfits
Recover the Clouds Wand
Awaken the Islands Realm
Rescue all 6 Islands Parrots
Recover the Islands Wand
Unlock all 6 Islands Outfits
Awaken the Forest Realm
Rescue all 6 Forest Parrots
Unlock all 6 Forest Outfits
Recover the Forest Wand
Unlock your 1st Outfit
Rescue your 1st Parrot