Here is the full list of all 19 Doors of Insanity achievements.
Play on insane difficulty
Reach character lv10
Win a match in PvP
Dont get fisted by God's "My Wrath" skill
Collect over 10 artifacts in one run
Defeat the 3rd boss -God
Have over 99 Absorb in a turn
Play on hard difficulty
Get 1000 gold during your run
Defeat your first mini boss
Defeat the 2nd boss -Void
Don't be greedy!
Win a battle with 4 summons of the same type at once
Consume a card
Reach character lv 2
Buy anything from the crystal shop
Die for the first time
Defeat the 1st boss -Azriel
Put on your first piece of equipment