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