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