Full list of all 42 Infernax achievements.
The base game contains 30 achievements, and there is 1 DLC pack containing 12 achievements.
Complete good playthrough
Leave all the work to Tancred
Complete the game as good after turning evil
Travel to the future and defeat Azazel
Complete ultimate evil playthrough
Slay Sir Tancred
Complete evil playthrough
Defeat Belphegor, The Father of Destruction
Save at all statues after becoming evil
Begin down the path of evil
Listen to Hans' story... ALL OF IT
Up Up Down Down Left Right Left Right....etc
Summon the tornado
Obtain the final armor
Defeat 5 enemies with one Thunder/Fire storm
Complete ultimate good playthrough
Complete the game on Classic Mode
Defeat Alastor, The Hope Devourer
Obtain the final weapon
Get the Necronomicon from Robert's cold dead hands
Defeat Apollyon, The Cursed Cherubim
Reflect a projectile and defeat 3 enemies
Have Gregor perform an exorcism
Defeat Paimon again
Cleanse the dreamscape
Enter a code in the Game Wizard book
Defeat Leviathan, The Sunken Corruptor
Learn the Guided Strike Skill
Defeat Kalamon, The Glutton of Pain
Defeat Mahalmon, The Spewer of Lies
Purchase an Evil tool for the Squire
Complete a game with a friend
Play a game with a friend... with guns...
Make the Mayor work his core
Parade your Duke in any village
Fully upgrade all the Squire's tools
Take a shortcut to Stormheim Castle's chest
Eat. the. wall. chicken.
Sleep until you can't sleep no more
Block a projectile with the Squire's shield on the ground
Purchase the Squire his first tool
Turn around and take the boat