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