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