Inferno returns to Oslo, Norway from April 2-5, 2026, delivering four days of extreme metal featuring legendary Norwegian black metal pioneers Mayhem alongside international heavyweights Deicide, Enslaved, and Primordial. The festival showcases 40 artists spanning black metal, death metal, and industrial sounds, with notable performances from Old Man's Child, The Kovenant, Samael, and Incantation. Norwegian metal dominates the lineup with acts like Enslaved, Funeral, Mork, and rising stars Møl, while German and Irish bands round out this comprehensive extreme metal gathering.