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