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