Full list of all 27 Ikenfell achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox One.
All achievements
Achievements they've won
Achievements they've not won
Thank You For Playing
The Allcat Watches Over You
Defeated Fantom
Defeated Aeldra
Defeated the Allcat
Defeated the Specters
Upgraded All Gem Accessories
Defeated Codexus
Defeated the Unseen
Defeated Agony
Found the Book of Alchemy
Defeated the Gardener
Defeated Bloodwyn
Bought All Gem Accessories
Defeated Radegund
Defeated the Ghost Legion
Defeated Ibn, Bax & Gilda
Defeated Twinkle
Defeated the Snatcher
Defeated Gilda 1-on-1
Defeated Blackhat
Defeated Chuckles
Defeated Gilda
Defeated Adorable Kitten
Defeated Beacon
Defeated Ibn & Bax
Defeated Turmoil