Here is the full list of all 88 Power Fantasy achievements.
Reach level 10.
Defeat the Risen Minotaur.
Discover a perk synergy.
Touch your first bufferfly.
Survive 3 minutes without attacking once.
Survive 5 minutes with Aric.
Survive 10 minutes with Ember.
Upgrade 10 perks.
Slay 100 enemies without leveling up.
Survive 10 minutes without taking any damage.
Get killed by a Mimic.
Slay 100 bosses.
Defeat the Slime Cube.
Defeat the Skeleton King.
Defeat the Ghoulish Giant.
Defeat the Angel of Death.
Equip 5 items at once.
Defeat all bosses in one run.
Leave 20 items on the ground
Defeat all bosses in one run. (Nightmare 5 difficulty)
Defeat all bosses in one run without taking any damage.
Defeat all bosses in one run without taking any damage. (Nightmare 5 difficulty)
As Misty, use your broom at least 5 times in one game.
Reach level 15.
Reach level 20.
Reach level 25.
Reach level 30.
Survive 15 minutes with Aric (Normal difficulty)
Survive 15 minutes with Aric (Nightmare 5 difficulty)
Survive 15 minutes with Ember (Normal difficulty)
Survive 15 minutes with Ember (Nightmare 5 difficulty)
Survive 15 minutes with Icicle (Normal difficulty)
Survive 15 minutes with Icicle (Nightmare 5 difficulty)
Survive 15 minutes with Kaito (Normal difficulty)
Survive 15 minutes with Kaito (Nightmare 5 difficulty)
Survive 15 minutes with Misty (Normal difficulty)
Survive 15 minutes with Misty (Nightmare 5 difficulty)
Slay 10.000 enemies.
Survive 15 minutes with Zikk (Normal difficulty)
Survive 15 minutes with Zikk (Nightmare 5 difficulty)
Survive Nightmare 1 with one hero.
Survive Nightmare 2 with two heroes.
Survive Nightmare 3 with three heroes.
Survive Nightmare 4 with four heroes.
Survive Nightmare 5 with five heroes.
As Ember, survive a run with 5 ice perks.
As Icicle, survive a run with 5 fire perks.
Survive your first challenge.
Survive with at least 4 physical and 4 arcane perks.
Touch 10 bufferflies in one run.
Beat the challenge Mirrored Gargoyle.
Beat the challenge The Void.
Obtain 10 unlockables.
Survive Nightmare 5 without attacking once.
Survive Krampus Night (Normal difficulty)
Complete all Nightmare 5 challenges in one run.
Get Whisper of Death after acquiring all five books.
Defeat the Angel of Death without any projectile damage modifiers. (Nightmare 3+)
Reach level 40 with one projectile.
Slay 25.000 enemies during one run in Dark Abyss.
Survive Krampus Night (Nightmare 5 difficulty)
Survive 15 minutes with Daria (Normal difficulty)
Survive 15 minutes with Gundel (Normal difficulty)
Survive 15 minutes with Daria (Nightmare 5 difficulty)
Survive Hell for 10 minutes.
Die by the Hell-o-Meter reaching its maximum.
Reach Hell-level 50.
Survive 15 minutes with Gundel (Nightmare 5 difficulty)
Die with at least 10 remaining rerolls.
Survive 15 minutes with Effy (Normal difficulty)
Defeat the Grim Reaper.
Survive with Kaze (Normal difficulty)
Survive with Kaze (Nightmare 5 difficulty)
Defeat Krampus.
(DLC) In Krampus Night, destroy an evil snowman during the challenge Snowball Fight.
Reach level 35.
Reach level 40.
Survive 15 minutes with Effy (Nightmare 5 difficulty)
Reach level 25 with Santa.
Slay 100.000 enemies.
Beat the challenge Snowball Fight.
Slay 1.000.000 enemies.
Touch a total of 300 bufferflies.
Beat the challenge Armored Warrior.
Beat the challenge Apocalyptic Riders.
Survive a run with at least 420 unspent coins.
Have 5 companions at once.
Spend a total of 1000 coins at the Undead Merchant.