Full list of all 33 Moonscars achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox One.
Cast the very first clayborn mould.
Slay the first doppelganger of Grey Irma.
Fall under Moonhunger first time.
Alleviate Moonhunger first time.
Discover all types of Special Weapon.
Learn a witchery of greatest power.
Maximize regular weapon damage.
Maximize Ichor Gauge.
Maximize Health Gauge.
Equip gemstones in all slots.
Slay Traitor Chokran of the Pristines.
Slay Gniewko, the Royal Infant.
Slay Sweet Wanda of the Pristines.
Slay Cruel Lajos of the Pristines.
Slay your shadow and cleave the Moon.
Slay Zoran, the Sculptor.
Kind doppel is killed
Kind doppel returned to help
Etalag survived to the end
Yarema returned as clayborn
Adelinka: player received tier-3 reward.
Karina: died eventually from Moonhunger.
Horpyna: received fired baby clayborn.
King Drahan: player listened to all stories
Yadwiga: enthroned
Ion: departed from the kingdom.
25 enemies died from spikes
5 enemies killed in under 3 seconds
10 glands spent (trade, reroll, etc.)
Stun 50 enemies
25 enemies died from status effects
Parry enemies (successfully) 50 times
Die 10 times