Here is the full list of all 38 Ziggurat achievements.
Died after killing the boss
Win the game with Argo on Normal difficulty in less than 45 minutes
Die 50 times
Find a super secret cheat code
Win a game with every character (any difficulty)
Unlock all weapons,perks,lore & character classes
Unlock all perks
Unlock all magic weapons
Kill all enemies at least once (including bosses)
Unlock all enemies in the bestiary
Unlock all amulets
Win the game without using any level up
Unlock all character classes
Find all lore scrolls
Kill 5000 enemies
Die 25 times
Get to floor 3 using only the magic wand (Apprentice class only)
Break 2,000 things (Barrels, tombs...)
Kill 500 enemies affected with elemental states
Die 10 times
Reach floor 2 without getting damaged
Kill a Lost soul with the Skull of Xanatos
Survive the Ziggurat
Master a perk by getting it to level 5
Find a secret room
You died on a danger room
You met your match in the final showdown
Reach experience level 15
Kill 1000 enemies
Reach experience level 10
Find your first amulet
You reached 3rd floor. Now the real lesson begins.
Reach experience level 5
Equip a weapon of every kind
Complete a challenge room
Get your first level up
You've been ambushed in a treasure room
Win a game on hard difficulty