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