When the demon Neron boosts the powers of the DC Universe's villains, Earth's heroes struggle to save humanity! Neron makes DC's villains--and heroes--an offer they can't refuse, dangling serious power upgrades at the cost of their souls. Who will say yes? Who will say no? And will the DC Universe ever be the same? Underworld Unleashed- The 25th Anniversary Edition collects the main series by Mark Waid and Howard Porter, along with tie-ins expanding the world of the story. Collects The Unexpected #1, Underworld Unleashed #1-3, Underworld Unleashed- Abyss--Hell's Sentinel #1, Underworld Unleashed- Apokolips--Dark Uprising #1, Underworld Unleashed- Batman--Devil's Asylum #1, and Underworld Unleashed- Patterns of Fear #1.