Full list of all 42 Infernax achievements.
The base game contains 30 achievements, and there is 1 DLC pack containing 12 achievements.
Complete evil 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
Listen to Hans' story... ALL OF IT
Save at all statues after becoming evil
Begin down the path of evil
Enter a code in the Game Wizard book
Up Up Down Down Left Right Left Right....etc
Complete ultimate good playthrough
Obtain the final weapon
Get the Necronomicon from Robert's cold dead hands
Defeat Paimon again
Complete good playthrough
Complete the game on Classic Mode
Defeat Belphegor, The Father of Destruction
Obtain the final armor
Cleanse the dreamscape
Defeat Alastor, The Hope Devourer
Have Gregor perform an exorcism
Defeat Apollyon, The Cursed Cherubim
Defeat Leviathan, The Sunken Corruptor
Reflect a projectile and defeat 3 enemies
Learn the Guided Strike Skill
Defeat Kalamon, The Glutton of Pain
Defeat 5 enemies with one Thunder/Fire storm
Defeat Mahalmon, The Spewer of Lies
Summon the tornado
Take a shortcut to Stormheim Castle's chest
Make the Mayor work his core
Complete a game with a friend
Turn around and take the boat
Purchase an Evil tool for the Squire
Eat. the. wall. chicken.
Block a projectile with the Squire's shield on the ground
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
Play a game with a friend... with guns...