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