Full list of all 56 For The King achievements worth 1,000 gamerscore. It takes around 60-80 hours to unlock all of the achievements on Xbox One.
Defeat Vexor on Master
Defeat the Chaos Beast
Defeat the Songstress
Purge all 4 Water Temples
Defeat Vexor on Journeyman
Reach the Inferno
Reach the bottom of Hildebrant's Cellar
Win a game of Gold Rush
Honor 50 Stone Heroes
Clear the Flooded Crypt
Complete 50 Side Quests
Survive the Lava Dungeon
Smash 150 Skellys
Unlock 40 items from the Lore Store
Slay the dragon at the top of Frostbite Peak
Unlock the armory
Defeat the Yeti, free her "prisoner"
Kill 5 Snowmen
Break a sieged town
Help Hildebrant retrace his steps
Defeat Vexor on Apprentice
Reach the top of Harazuel
Defeat Coal Heart
Topple 15 Crag Monsters
Defeat Deimos
Unlock 20 items from the Lore Store
Purge the Buried Temple
Clear both Demon Caves
Solve the King's Maze
Defeat the Bandit King
Defeat the Sea King
Find Captain Greenbeard's Ship
Defeat the Old One
Have 5000 Gold
Clear 5 Sea Caves in 1 game
Use 10 candies
Honor 15 Stone Heroes
Defeat the Foul Priestess
Use 100 herbs
Kill the Kraken
Kill 10 enemies with Firearms
Defeat the Royal Droll
Defeat Lucky
First party wipe
Defeat the Hangman
Have 1500 Gold
Defeat the Lich's Crypt
Clear the Forgotten Cellar
Defeat the Mind Bender
Defeat Disciple
Escape the Mage Dungeon
Kill a thief attempting to flee
Purge the Glittering Mines
Defeat the Cultist Camp
Break a weapon
Revive a party member