Here is the full list of all 38 Deathstate achievements.
Beat the game without picking up a grimoire item.
Enter the Dark Realm.
Beat the game as the Embalmer.
Play the game for a combined total of 24 hours.
Have 20 or more organs at one time.
Turn into a Demon as the Priest.
Die 100 times.
Punch the final boss as the Brawler.
Find and equip 5 different grimoires in a single game as the Seeker.
Beat the game twice sequentially.
Drink 10 potions as the Scientist.
Beat the game without picking up a weapon item.
Collect three eye organs as the Eye.
Kill a boss while under the effects of an Introspection potion.
Teleport 20 times in one game as the Starcreep.
Die at Depth 1 as the Embalmer.
Unlock all bestiary entries.
Beat the game.
Kill a boss while under the effects of a Hot Blood potion.
Kill an Elite enemy after time runs out in a level.
Enter the Lost Arcanium.
Enter the Maze of Ix.
Find 500 gold in one run.
Die in the first minute of gameplay.
Beat a level without taking damage.
Gamble with the Merchant as Scar.
Resurrect 30 or more enemies with a single Awaken potion.
Enter the Ossein Swamp.
Escape a level after time has run out.
Find a Demon or Horror aspect stone.
Enter the Fortress of Koth.
Unlock all playable characters.
Beat the game as the Skeleton King.
Beat the game at maximum Desecration.
Beat the game without taking damage.
Start and end a boss fight with only one hit remaining.
Find at least 140 unique items.
Unlock all other achievements.