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 Clouds Elder
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
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
Unlock all 6 Islands Outfits
Recover the Islands Wand
Awaken the Forest Realm
Unlock all 6 Forest Outfits
Rescue all 6 Forest Parrots
Recover the Forest Wand
Unlock your 1st Outfit
Rescue your 1st Parrot