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