The Dome of D'Sparil

The Dome of D'Sparil is the final episode of Heretic. After killing the Maulotaurs at the Portals of Chaos in the Hell's Maw, Corvus enters a giant portal to an ancient castle at the bottom of the abyssal ocean, protected by gigantic crystal domes and overrun by monsters. This is D'Sparil's strongest fortress, for it is where he resides.

Levels

 * E3M1: The Storehouse
 * E3M2: The Cesspool
 * E3M3: The Confluence
 * E3M4: The Azure Fortress (Exit to secret level)
 * E3M5: The Ophidian Lair
 * E3M6: The Halls of Fear
 * E3M7: The Chasm
 * E3M8: D'Sparil's Keep (D'Sparil is boss)
 * E3M9: The Aquifer (Secret level)