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