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