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