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