Full list of all 37 Ziggurat achievements worth 1,000 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Xbox One.
Unlock all magic weapons
Died after killing the boss
Unlock all character classes
Unlock all amulets
Unlock all enemies in the bestiary
You met your match in the final showdown
Kill 5000 enemies
Kill 500 enemies affected with elemental states
Die 25 times
Find all lore scrolls
Get to floor 3 using only the magic wand (Apprentice class only)
Kill all enemies at least once (including bosses)
Break 2,000 things (Barrels, tombs...)
Find a secret room
Survive the Ziggurat
Reach experience level 15
Master a perk by getting it to level 5
Kill 1000 enemies
Reach experience level 10
Kill a Lost soul with the Skull of Xanatos
Die 10 times
You reached 3rd floor. Now the real lesson begins.
Reach experience level 5
Equip a weapon of every kind
You've been ambushed in a treasure room
You died on a danger room
Complete a challenge room
Find your first amulet
Get your first level up
Unlock all perks
Unlock all weapons,perks,lore & character classes
Die 50 times
Win the game without using any level up
Reach floor 2 without getting damaged
Win a game with every character (any difficulty)
Win a game on hard difficulty
Win the game with Argo on Normal difficulty in less than 45 minutes