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