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.
[Cleric] Reach Agony III on the Haunted Caverns.
Defeat the Lord of Pain.
Kill a total of 1 lord.
[Cleric] Apply 10 stacks of Fragile on a single enemy at once.
Deal 1 500 000 damage with Phantom Needles.
Kill 25 000 enemies in one run.
[Cleric] Reach level 60.
Deal 750 000 damage with Phantom Needles.
[Cleric] Deal 500 000 burn damage in one run.
[Cleric] Deal 5 000 000 magic damage in one run.
Play for 333 minutes.
Kill 40 000 Skeletons.
Enter the Halls of Torment 20 times and survive at least 5 minutes.
Kill 100 000 enemies in total.
Get Lightning Strike to Level 3 to be able to select Ability Upgrades.
[Cleric] Regenerate 1 500 HP in one run. Only passive regeneration is counted.
[Cleric] Reach level 30.
[Cleric] Deal 1 500 000 magic damage in one run.
[Cleric] Deal 500 000 magic damage in one run.
Kill a total of 50 elite enemies.
[Exterminator] Kill 50 000 enemies.
Survive until there are only 10 minutes left.
[Exterminator] Deal 3 000 000 fire damage in one run.
Kill 15 000 enemies in one run.
Deal 750 000 damage with Astronomer's Orbs.
Defeat the Lich.
[Exterminator] Apply burn to 50 000 enemies.
Kill 1 000 enemies in one visit of the Forgotten Viaduct.
[Swordsman] Get hit a total of 500 times over all attempts.
[Swordsman] Acquire the trait [Strength IV] in a run.
Level Up 500 times.
[Archer] Do not get hit for 3 minutes.
[Archer] Crit enemies 5 000 times within one run.
[Archer] Acquire the trait [Quick Hands IV] in a run.
[Archer] Reach level 30.
Purchase 10 items from the wellkeeper.
Kill 5 000 enemies in one visit of the Ember Grounds.
Apply damage effects 50 000 times.
Apply damage effects 500 000 times.
Collect a total of 20 000 gold.
Enter Forgotten Viaduct and rescue the Cupbearer.
[Archer] Increase your movement speed to 8m/s.
Purchase an item from the Wellkeeper.
Defeat the Frost Knight.
Deal 500 000 damage with Dragon's Breath.
[Swordsman] Hit 1 000 Enemies for 300 or more damage in one run. (Main Weapon)
Survive the Ember Grounds until there are only 12 minutes left.
Deal 10 000 000 damage in total.
[Swordsman] Deal 1 000 000 damage with the main weapon.
Kill a total of 10 bosses.
[Exterminator] Deal 1 000 000 fire damage in one run.
[Exterminator] Destroy 200 Objects.
[Exterminator] Apply burn to 10 000 enemies.
Defeat the Flamedancer.
[Swordsman] Reach level 30.
Consume a total of 10 potions.
[Exterminator] Walk 8 000 meters in one run.
Get Phantom Needles to Level 3 to be able to select Ability Upgrades.
Kill 5 000 enemies in one run.
Defeat the Skeleton Lord.
[Exterminator] Reach level 30.
[Exterminator] Deal 300 000 fire damage in one run.
Retrieve 1 item from the Halls of Torment.
Enter the Halls of Torment 5 times and survive at least 5 minutes.
[Exterminator] Deal 200 000 burn damage in one run.
[Exterminator] Apply 50 or more burn effects at the same time.
Kill 1 000 enemies in one visit of the Ember Grounds.
Survive the Ember Grounds until there are only 22 minutes left.
Rescue the Wellkeeper.
Survive until there are only 14 minutes left.
Get Astronomer's Orbs to Level 3 to be able to select Ability Upgrades.
[Swordsman] Hit 20 Enemies with a single attack.
[Swordsman] Walk 5 000 meters in one run.
Collect a total of 300 gold.
[Swordsman] Deal 200 000 damage with the main weapon.
Defeat the Imp Chieftain.
Survive until there are only 26 minutes left.
Enter the Halls of Torment.
Defeat the Wyrm Queen.
Kill 40 000 Imps.
Kill 15 000 enemies in one visit of the Ember Grounds.
Defeat the Lord of Regret.
Survive the Ember Grounds until there are only 2 minutes left.
Kill 40 000 Hellhounds.
Kill 40 000 Slimes.
[Archer] Crit enemies 50 000 times within one run.
[Archer] Kill 20 000 enemies in one run.
[Archer] Reach level 60.
[Archer] Walk 100 000 meters.
[Archer] Enter the Halls of Torment 5 times.
[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.
Kill 50 000 enemies with effects.
[Exterminator] Reach level 60.
[Swordsman] Kill a total of 10 bosses.
[Swordsman] Deal 3 000 000 damage in one run.
[Swordsman] Reach level 60.
[Swordsman] Regenerate 2 000 HP in one run
Deal 3 000 000 damage with Ring Blades.
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.
Deal 3 000 000 damage with Phantom Needles.
Kill 50 000 Scorched.
Kill 50 000 Wraiths
Survive the Forgotten Viaduct until there are only 2 minutes left.
Defeat the Lord of Despair.
Kill 10 000 enemies in one visit of the Forgotten Viaduct.
Kill 50 000 Gargoyles
Defeat the Hydra.
Defeat the Wraith Horseman.
[Cleric] Acquire the trait [Metabolism V] in a run.
Deal 3 000 000 damage with Radiant Aura.
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.
[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.
Recover 100 000 HP in total
[Shield Maiden] Survive 28 minutes without any defense buffs.
[Shield Maiden] Defeat a Lord.
[Shield Maiden] Reach level 60.
Deal 3 000 000 damage with Kugelblitz.
[Shield Maiden] Hit 15 Enemies with a single attack. Can't be done with the shield bash.
[Shield Maiden] Get hit 500 times in a single run.
[Shield Maiden] Deal 3 000 000 damage with the shield bash.
[Shield Maiden] Crit enemies 2 000 enemies with your main attack in one run. Shield Bash doesn't count.
[Sorceress] Increase your movement speed to 11m/s.
Deal 3 000 000 damage with Meteor Strike.
[Sorceress] Deal 5 000 000 lightning damage in one run.
[Sorceress] Reach level 60.
[Sorceress] Hit 1 000 Enemies for 500 or more damage in one run. (Main Attack)
[Sorceress] Apply 20 stacks of electrify on a single enemy.
[Sorceress] Deal 500 000 electrify damage in one run.
[Sorceress] Block 90 attacks in one run.
Apply electrify 100 000 times.
[Sorceress] Apply burn to 1 000 enemies in a single run.
[Warlock] Acquire the trait [Channeling V] in a run.
[Warlock] Take a total of 15 000 damage over all runs.
[Warlock] Deal 5 000 000 summon damage in one run.
[Warlock] Survive 28 minutes without using your main weapon.
[Warlock] Survive 5 minutes with a maxmimum health of 250 or less.
[Warlock] Reach level 60.
[Warlock] Kill 5 000 Hellhounds in one exploration.
Deal 3 000 000 damage with the Golem.
[Warlock] Do not get hit for 5 minutes.
Deal 1 500 000 damage with Lightning Strike.
Deal 750 000 damage with Lightning Strike.
Deal 1 500 000 damage with Astronomer's Orbs.
Deal 1 500 000 damage with Arcane Splinter.
Deal 750 000 damage with Arcane Splinter.
Get Arcane Splinter to Level 3 to be able to select Ability Upgrades.
Survive the Forgotten Viaduct until there are only 10 minutes left.
Survive the Forgotten Viaduct until there are only 18 minutes left.
Kill 5 000 enemies in one visit of the Forgotten Viaduct.
Deal 1 500 000 damage with Transfixion.
Deal 750 000 damage with Transfixion.
[Archer] Reach Agony III on the Haunted Caverns.
[Archer] Crit enemies 20 000 times within one run.
Deal 1 500 000 damage with Radiant Aura.
Deal 750 000 damage with Radiant Aura.
[Exterminator] Reach Agony III on the Ember Grounds.
Deal 1 000 000 damage with Dragon's Breath.
[Shield Maiden] Reach Agony III on the Forgotten Viaduct.
Reach level 30.
Deal 1 500 000 damage with Kugelblitz.
Deal 750 000 damage with Kugelblitz.
[Shield Maiden] Deal 1 500 000 damage with the shield bash.
[Shield Maiden] Deal 300 000 damage with the shield bash.
Deal 1 500 000 damage with Meteor Strike.
Deal 750 000 damage with Meteor Strike.
[Sorceress] Deal 2 000 000 lightning damage in one run.
[Sorceress] Deal 500 000 lightning damage in one run.
[Sorceress] Reach Agony III on the Forgotten Viaduct.
[Sorceress] Reach level 30.
Deal 1 500 000 damage with Ring Blades.
Deal 750 000 damage with Ring Blades.
[Swordsman] Reach Agony III on the Haunted Caverns.
[Warlock] Deal 2 000 000 summon damage in one run.
[Warlock] Deal 500 000 summon damage in one run.
[Warlock] Reach Agony III on the Ember Grounds.
[Warlock] Reach level 30.
Deal 1 500 000 damage with the Golem.
Deal 750 000 damage with the Golem.
Kill a total of 100 bosses.
Crit enemies 50 000 times.
Crit enemies 500 000 times.
Deal 100 000 000 damage in total.
Apply debuffs 50 000 times.
Apply debuffs 500 000 times.
Kill a total of 150 elite enemies.
Kill 400 000 enemies in total.
Collect a total of 200 000 gold.
Purchase 40 items from the wellkeeper.
Level Up 2 000 times.
Kill a total of 10 lord.
Play for 666 minutes.
Consume a total of 100 potions.
Deal 500 000 damage with Flame Strike.
Deal 1 000 000 damage with Flame Strike.
Deal 2 000 000 damage with Flame Strike.
Deal 750 000 damage with Frost Avalanche.
Deal 1 500 000 damage with Frost Avalanche.
Deal 3 000 000 damage with Frost Avalanche.
Kill 10 000 Beasts.
[Frozen Depths] Defeat the Basilisk.
[Frozen Depths] Defeat the Twisted Construct.
[Frozen Depths] Defeat the Elder Giant.
Kill 10 000 Ghouls.
Kill 10 000 creatures made of ice.
[Frozen Depths] Kill 500 enemies in one visit of the Frozen Depths.
[Frozen Depths] Kill 3 000 enemies in one visit of the Frozen Depths.
[Frozen Depths] Kill 7 500 enemies in one visit of the Frozen Depths.
[Frozen Depths] Defeat the Lord of Hate.
[Frozen Depths] Survive the Frozen Depths until there are only 18 minutes left.
[Frozen Depths] Survive the Frozen Depths until there are only 10 minutes left.
[Frozen Depths] Survive the Frozen Depths until there are only 2 minutes left.
[Norseman] Kill 5 000 enemies with the Frost effect in a single run.
[Norseman] Hit 30 Enemies with a single Frost Nova.
[Norseman] Hit Enemies 20 000 times with the axes. Must be done within one run.
[Norseman] Reach level 30.
[Norseman] Reach level 60.
[Norseman] Reach Agony III on the Frozen Depths.
[Norseman] Deal 500 000 physical damage in one run.
[Norseman] Deal 2 000 000 phyiscal damage in one run.
[Norseman] Deal 5 000 000 physical damage in one run.
Deal 750 000 damage with Spirit Warrior.
Deal 1 500 000 damage with Spirit Warrior.
Deal 3 000 000 damage with Spirit Warrior.
Deal 750 000 damage with Arcane Rift.
Deal 1 500 000 damage with Arcane Rift.
Deal 3 000 000 damage with Arcane Rift.
[Beast Huntress] Have your Dog deal 1 000 000 damage.
[Beast Huntress] Deal 1 000 000 frost damage in one run.
[Beast Huntress] Deal 500 000 ice damage in one run.
[Beast Huntress] Deal 2 000 000 ice damage in one run.
[Beast Huntress] Deal 5 000 000 ice damage in one run.
[Beast Huntress] Reach level 30.
[Beast Huntress] Reach level 60.
[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
[Norseman] Collect 10 Power Ups in one run.
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.
Deal a 25 000 Damage or better hit on a single enemy with Radiant Aura without Fragile effect.
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 Void Caller.
Defeat the Village.
Defeat the Twisted Knight.
Kill 6 000 enemies in one visit of the Chambers of Dissonance.
Kill 12 000 enemies in one visit of the Chambers of Dissonance.
Kill 17 000 enemies in one visit of the Chambers of Dissonance.
Defeat the Lord of Discord.
Survive the Chambers of Dissonance until there are only 20 minutes left.
Survive the Chambers of Dissonance until there are only 12 minutes left.
Survive the Chambers of Dissonance until there are only 4 minutes left.
Survive the Chambers of Dissonance in Agony mode until the lord appears.
Deal 10 000 damage with a single hit.
Deal 1 500 000 damage with Grenades.
Deal 3 500 000 damage with Grenades.
Deal 2 000 000 damage with items.
Deal 5 000 000 damage with items.
Reach level 40.
Reach level 80.
Reach Agony III in Chambers of Dissonance
Deal 1 000 000 damage with Morning Star.
Deal 2 000 000 damage with Morning Star.
Deal 5 000 000 damage with Morning Star.
Deal 1 000 000 projectile damage in one run.
Deal 4 000 000 projectile damage in one run.
Deal 10 000 000 projectile damage in one run.
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.
Have Frost Avalanche fire/place projectiles or obstacles 10 000 times per minute.
Reach an average of 10 critical hits per second with the main attack of the Sorceress.
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.