Here is the full list of all 304 Halls of Torment achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Apply electrify 100 000 times.
[Sorceress] Reach Agony III on the Forgotten Viaduct.
Play for 666 minutes.
Deal 3 000 000 damage with Phantom Needles.
Deal 1 500 000 damage with Meteor Strike.
[Norseman] Collect 10 Power Ups in one run.
Kill 400 000 enemies in total.
[Shield Maiden] Deal 3 000 000 damage with the shield bash.
Deal 1 000 000 damage with Flame Strike.
[Shield Maiden] Deal 1 500 000 damage with the shield bash.
Kill 50 000 enemies with effects.
Deal 1 000 000 damage with Dragon's Breath.
Deal 3 000 000 damage with Ring Blades.
[Swordsman] Get hit a total of 500 times over all attempts.
Deal 2 000 000 damage with Morning Star.
Apply damage effects 500 000 times.
[Swordsman] Deal 3 000 000 damage in one run.
Deal 1 500 000 damage with Ring Blades.
Deal 1 000 000 damage with Morning Star.
Deal 750 000 damage with Ring Blades.
[Swordsman] Reach Agony III on the Haunted Caverns.
Deal 750 000 damage with Arcane Splinter.
[Archer] Reach Agony III on the Haunted Caverns.
Get Arcane Splinter to Level 3 to be able to select Ability Upgrades.
Deal 750 000 damage with Arcane Rift.
Enter the Halls of Torment 20 times and survive at least 5 minutes.
[Swordsman] Regenerate 2 000 HP in one run
Deal 750 000 damage with Meteor Strike.
[Swordsman] Deal 1 000 000 damage with the main weapon.
[Swordsman] Reach level 60.
[Swordsman] Hit 1 000 Enemies for 300 or more damage in one run. (Main Weapon)
[Sorceress] Apply 20 stacks of electrify on a single enemy.
Deal 500 000 damage with Dragon's Breath.
Reach an average of 10 critical hits per second with the main attack of the Sorceress.
Deal 3 000 000 damage with Kugelblitz.
[Sorceress] Increase your movement speed to 11m/s.
Kill a total of 10 lord.
[Sorceress] Deal 5 000 000 lightning damage in one run.
[Sorceress] Deal 500 000 electrify damage in one run.
[Sorceress] Reach level 60.
[Sorceress] Hit 1 000 Enemies for 500 or more damage in one run. (Main Attack)
[Sorceress] Deal 2 000 000 lightning damage in one run.
Kill 40 000 Hellhounds.
[Sorceress] Apply burn to 1 000 enemies in a single run.
[Sorceress] Reach level 30.
[Sorceress] Deal 500 000 lightning damage in one run.
Reach level 80.
Deal 1 500 000 damage with Kugelblitz.
Deal 1 500 000 damage with Grenades.
Deal 10 000 000 projectile damage in one run.
Deal 4 000 000 projectile damage in one run.
Reach level 40.
Deal 1 000 000 projectile damage in one run.
[Exterminator] Walk 8 000 meters in one run.
[Exterminator] Destroy 200 Objects.
[Exterminator] Reach level 60.
[Exterminator] Apply burn to 10 000 enemies.
Kill 40 000 Slimes.
[Exterminator] Deal 200 000 burn damage in one run.
[Exterminator] Deal 3 000 000 fire damage in one run.
[Exterminator] Reach level 30.
[Exterminator] Deal 1 000 000 fire damage in one run.
[Exterminator] Deal 300 000 fire damage in one run.
[Frozen Depths] Defeat the Lord of Hate.
Deal 3 000 000 damage with Spirit Warrior.
Deal 3 000 000 damage with Radiant Aura.
Kill 10 000 Ghouls.
[Beast Huntress] Deal 5 000 000 ice damage in one run.
Deal 1 500 000 damage with Radiant Aura.
[Beast Huntress] Have your Dog deal 1 000 000 damage.
Deal 1 500 000 damage with Spirit Warrior.
[Beast Huntress] Reach level 60.
[Beast Huntress] Deal 2 000 000 ice damage in one run.
Deal 750 000 damage with Spirit Warrior.
[Beast Huntress] Deal 500 000 ice damage in one run.
[Beast Huntress] Reach level 30.
Defeat the Lord of Discord.
Deal 1 500 000 damage with Lightning Strike.
Have Frost Avalanche fire/place projectiles or obstacles 10 000 times per minute.
[Norseman] Deal 5 000 000 physical damage in one run.
Kill 6 000 enemies in one visit of the Chambers of Dissonance.
Defeat the Void Caller.
Survive the Chambers of Dissonance until there are only 4 minutes left.
[Norseman] Reach level 60.
[Norseman] Deal 2 000 000 phyiscal damage in one run.
Survive the Chambers of Dissonance until there are only 12 minutes left.
Play for 333 minutes.
[Norseman] Reach level 30.
Survive the Chambers of Dissonance until there are only 20 minutes left.
Recover 100 000 HP in total
[Norseman] Deal 500 000 physical damage in one run.
[Norseman] Hit 30 Enemies with a single Frost Nova.
[Frozen Depths] Kill 7 500 enemies in one visit of the Frozen Depths.
[Frozen Depths] Survive the Frozen Depths until there are only 2 minutes left.
Deal 750 000 damage with the Golem.
[Frozen Depths] Defeat the Elder Giant.
Deal 750 000 damage with Radiant Aura.
[Frozen Depths] Survive the Frozen Depths until there are only 10 minutes left.
[Frozen Depths] Defeat the Twisted Construct.
[Cleric] Acquire the trait [Metabolism V] in a run.
[Frozen Depths] Survive the Frozen Depths until there are only 18 minutes left.
[Frozen Depths] Kill 3 000 enemies in one visit of the Frozen Depths.
[Frozen Depths] Defeat the Basilisk.
Apply debuffs 50 000 times.
Kill a total of 50 elite enemies.
Deal 750 000 damage with Astronomer's Orbs.
Deal a 25 000 Damage or better hit on a single enemy with Radiant Aura without Fragile effect.
Deal 100 000 000 damage in total.
[Warlock] Kill 5 000 Hellhounds in one exploration.
Consume a total of 100 potions.
Kill 40 000 Skeletons.
Deal 750 000 damage with Kugelblitz.
[Warlock] Deal 5 000 000 summon damage in one run.
[Warlock] Reach level 60.
[Warlock] Deal 2 000 000 summon damage in one run.
[Warlock] Reach level 30.
[Warlock] Deal 500 000 summon damage in one run.
[Frozen Depths] Kill 500 enemies in one visit of the Frozen Depths.
Level Up 500 times.
Purchase 10 items from the wellkeeper.
Defeat the Lord of Regret.
[Shield Maiden] Defeat a Lord.
Kill 15 000 enemies in one visit of the Ember Grounds.
[Shield Maiden] Get hit 500 times in a single run.
Deal 3 000 000 damage with Frost Avalanche.
[Shield Maiden] Reach level 60.
[Shield Maiden] Deal 300 000 damage with the shield bash.
Kill 100 000 enemies in total.
Reach level 30.
[Shield Maiden] Hit 15 Enemies with a single attack. Can't be done with the shield bash.
Defeat the Lord of Despair.
Deal 1 500 000 damage with Phantom Needles.
Deal 1 500 000 damage with Transfixion.
Apply damage effects 50 000 times.
Survive the Forgotten Viaduct until there are only 2 minutes left.
Kill 10 000 enemies in one visit of the Forgotten Viaduct.
Deal 750 000 damage with Lightning Strike.
[Cleric] Regenerate 1 500 HP in one run. Only passive regeneration is counted.
[Cleric] Reach level 60.
Defeat the Hydra.
Kill 5 000 enemies in one visit of the Forgotten Viaduct.
Survive the Forgotten Viaduct until there are only 10 minutes left.
[Cleric] Deal 5 000 000 magic damage in one run.
Enter Forgotten Viaduct and rescue the Cupbearer.
Defeat the Frost Knight.
[Cleric] Apply 10 stacks of Fragile on a single enemy at once.
[Cleric] Reach level 30.
Survive the Forgotten Viaduct until there are only 18 minutes left.
Collect a total of 20 000 gold.
Defeat the Wraith Horseman.
[Cleric] Deal 1 500 000 magic damage in one run.
Kill 1 000 enemies in one visit of the Forgotten Viaduct.
[Cleric] Deal 500 000 magic damage in one run.
Purchase an item from the Wellkeeper.
Defeat the Lord of Pain.
Kill a total of 1 lord.
Survive until there are only 10 minutes left.
Deal 1 500 000 damage with Frost Avalanche.
Kill 25 000 enemies in one run.
[Archer] Kill 20 000 enemies in one run.
Defeat the Lich.
Kill 15 000 enemies in one run.
Retrieve 1 item from the Halls of Torment.
Crit enemies 50 000 times.
[Exterminator] Apply 50 or more burn effects at the same time.
[Archer] Enter the Halls of Torment 5 times.
Deal 500 000 damage with Flame Strike.
Deal 750 000 damage with Transfixion.
[Archer] Crit enemies 20 000 times within one run.
Survive the Ember Grounds until there are only 2 minutes left.
Defeat the Wyrm Queen.
Deal 750 000 damage with Phantom Needles.
[Archer] Reach level 60.
Deal 750 000 damage with Frost Avalanche.
Survive the Ember Grounds until there are only 12 minutes left.
Kill 5 000 enemies in one visit of the Ember Grounds.
Kill 1 000 enemies in one visit of the Ember Grounds.
Kill a total of 10 bosses.
Rescue the Wellkeeper.
Enter the Halls of Torment 5 times and survive at least 5 minutes.
Survive the Ember Grounds until there are only 22 minutes left.
Defeat the Flamedancer.
Get Astronomer's Orbs to Level 3 to be able to select Ability Upgrades.
Deal 10 000 000 damage in total.
[Archer] Do not get hit for 3 minutes.
[Archer] Crit enemies 5 000 times within one run.
Consume a total of 10 potions.
[Archer] Acquire the trait [Quick Hands IV] in a run.
[Archer] Reach level 30.
[Archer] Increase your movement speed to 8m/s.
Kill 5 000 enemies in one run.
[Swordsman] Acquire the trait [Strength IV] in a run.
Get Lightning Strike to Level 3 to be able to select Ability Upgrades.
[Swordsman] Hit 20 Enemies with a single attack.
Defeat the Skeleton Lord.
Survive until there are only 14 minutes left.
[Swordsman] Walk 5 000 meters in one run.
[Swordsman] Reach level 30.
[Swordsman] Deal 200 000 damage with the main weapon.
Get Phantom Needles to Level 3 to be able to select Ability Upgrades.
Collect a total of 300 gold.
Defeat the Imp Chieftain.
Survive until there are only 26 minutes left.
Enter the Halls of Torment.
Kill 40 000 Imps.
[Archer] Crit enemies 50 000 times within one run.
[Archer] Walk 100 000 meters.
[Archer] Wait for 180 seconds before you start moving. You must move in order to complete the quest.
[Exterminator] Apply burn to 200 000 enemies.
[Exterminator] Kill 50 000 enemies.
[Swordsman] Kill a total of 10 bosses.
Deal 3 000 000 damage with Transfixion.
Deal 2 000 000 damage with Dragon's Breath.
Deal 3 000 000 damage with Arcane Splinter.
Deal 3 000 000 damage with Astronomer's Orbs.
Deal 3 000 000 damage with Lightning Strike.
Kill 50 000 Scorched.
Kill 50 000 Wraiths
Kill 50 000 Gargoyles
Survive 20 minutes without regenerating any health. Recovery from Potions or effects is allowed.
Survive 28 minutes with your original max health. (Don't use items, blessings or traits)
[Cleric] Apply 50 000 debuffs in total.
[Cleric] Deal 500 000 burn damage in one run.
[Shield Maiden] Acquire the trait [Parry V] in a run.
[Shield Maiden] Wait for 180 seconds before you start moving. You must move in order to complete the quest.
[Shield Maiden] Survive 28 minutes without any defense buffs.
[Shield Maiden] Crit enemies 2 000 enemies with your main attack in one run. Shield Bash doesn't count.
Deal 3 000 000 damage with Meteor Strike.
[Sorceress] Block 90 attacks in one run.
[Warlock] Acquire the trait [Channeling V] in a run.
[Warlock] Take a total of 15 000 damage over all runs.
[Warlock] Survive 28 minutes without using your main weapon.
[Warlock] Survive 5 minutes with a maxmimum health of 250 or less.
Deal 3 000 000 damage with the Golem.
[Warlock] Do not get hit for 5 minutes.
Deal 1 500 000 damage with Astronomer's Orbs.
Deal 1 500 000 damage with Arcane Splinter.
[Cleric] Reach Agony III on the Haunted Caverns.
[Exterminator] Reach Agony III on the Ember Grounds.
[Exterminator] Apply burn to 50 000 enemies.
[Shield Maiden] Reach Agony III on the Forgotten Viaduct.
[Warlock] Reach Agony III on the Ember Grounds.
Deal 1 500 000 damage with the Golem.
Kill a total of 100 bosses.
Crit enemies 500 000 times.
Apply debuffs 500 000 times.
Kill a total of 150 elite enemies.
Collect a total of 200 000 gold.
Purchase 40 items from the wellkeeper.
Level Up 2 000 times.
Deal 2 000 000 damage with Flame Strike.
Kill 10 000 Beasts.
Kill 10 000 creatures made of ice.
[Norseman] Kill 5 000 enemies with the Frost effect in a single run.
[Norseman] Hit Enemies 20 000 times with the axes. Must be done within one run.
[Norseman] Reach Agony III on the Frozen Depths.
Deal 1 500 000 damage with Arcane Rift.
Deal 3 000 000 damage with Arcane Rift.
[Beast Huntress] Deal 1 000 000 frost damage in one run.
[Beast Huntress] Reach Agony III on the Frozen Depths.
Deal 750 000 damage with Hailstorm.
Deal 1 500 000 damage with Hailstorm.
Deal 3 000 000 damage with Hailstorm.
Deal 10 000 double crits or better with the Phantom Needles.
Hit Enemies 40 000 times with Astronomer's Orbs.
Apply 100 000 slow stacks in a single run.
Apply 150 000 effect stacks with Transfixion.
[Warlock] Have 20 Summons at the same active. *attack projectiles do not count
Have 300 Arcane Splinter active at the same time.
One hit kill 1 000 enemies that have 1 000 or more Health with a direct hit from Lightning Strike within one run.
Trigger 10 000 times direct Burn damage with Dragon's Breath. This is done by applying burn on enemies with 20 burn stacks.
Deal 160 Crits with a single Meteor. Overcrits are getting counted.
Have all Ring Blades projectiles travel a distance of 804 672 meters within a single run.
Haave the Golem roll for a total duration of 20 minutes in a run.
Defeat the Village.
Defeat the Twisted Knight.
Kill 12 000 enemies in one visit of the Chambers of Dissonance.
Kill 17 000 enemies in one visit of the Chambers of Dissonance.
Survive the Chambers of Dissonance in Agony mode until the lord appears.
Deal 10 000 damage with a single hit.
Deal 3 500 000 damage with Grenades.
Deal 2 000 000 damage with items.
Deal 5 000 000 damage with items.
Reach Agony III in Chambers of Dissonance
Deal 5 000 000 damage with Morning Star.
Deal 5 000 000 direct damage with abilities.
Deal 15 000 000 direct damage with abilities.
Deal 50 000 000 direct damage with abilities.
Reach level 50.
Reach level 100.
Reach Agony IV in Chambers of Dissonance
Deal 10 000 000 damage with your main ability.
Deal 100 000 000 damage with your main ability.
Deal 2 000 000 damage with Spectral Fists.
Deal 5 000 000 damage with Spectral Fists.
Deal 10 000 000 damage with Spectral Fists.
Hit 500 enemies for 25 000 damage or more. Overkill damage counts.
Apply Frost 80 000 times with Hailstorm
Hit 40 enemies with a Morning Star for 100 times.
Deal 20 000 000 the dash or dash explosion of Spirit Warriors in one run.
Deal 100 000 damage with a single hit.
Kill 5 000 enemies at full life with a single hit of Arcane Rift.
Deal 1 000 times damage by applying the 20th+ electrify stack through Kugelblitz.