In the mid-90s, while Doomguy was blasting imps on Phobos, another lone warrior was lighting heretics aflame with a staff of dragon claws. Heretic , Raven Software’s dark fantasy masterpiece, built on the Doom engine, offered more than just medieval reskins. It introduced inventory items, flying enemies, and a world steeped in gothic dread. But for decades, its dedicated community has expanded that world dramatically through the power of custom WADs.