Here is the full list of all 30 Slain: Back from Hell achievements.
Finish the Bloodgrounds without dying at all.
Defeat the Banshee Queen without losing any health.
Complete Highlands level without killing an enemy with the flame blade.
Escape the Highlands Caves through the secret passage.
Watch 30 enemies get killed by traps.
Defeat the Thorn Beast without losing any health.
Find all five pieces of the Talisman.
Defeat Hogre without losing any health.
Slay 8 of your enemies in a trice.
Hit 6 Ice Meteors back at the Ice Beast.
Successfully execute 100 Critical Strikes.
Squash a Wolf Guard in a crusher trap.
Destroy 30 enemies with reflected projectiles.
Defeat the Fire Hounds without losing any health.
You Have Been Killed 100 times. Rejoice!
Kill every Beholder in the Hive without using mana.
Successfully avoid the first spike trap in the Bloodgrounds.
Die for the very first time.
Reached the top of the Blood Tower without falling in any gore pits.
Complete the Wolf Run without losing any health.
Defeat Lupus Rex without losing any health.
Defeat the Mother Beholder without losing any health.
Dispatch the Mother Beholder within 30 seconds.
Defeat the Ice Beast without losing any health.
Defeat Malikesh without losing any health.
Headbang after every single boss has been defeated.
Kill Vroll without taking any damage.
Destroy Vroll and liberate Chalh within 3 minutes.
Defeat the game without using any Mana.
Defeat the game without losing a single life.