Devil Jam is an action roguelite where players battle hordes in Hell to escape a cursed contract. You wield up to twelve weapons simultaneously, utilizing a unique 12-slot inventory system for deep build customization. Hand-drawn visuals depict Hell's denizens, culminating in boss fights against iconic figures like Death.

The game emphasizes rapid, intense combat and strategic inventory management. Players must master synergies within the 12-slot system to create powerful builds. Devil Jam brings a metal-infused, dark humor aesthetic to the survivor-like roguelite genre.