There is one character in the game, an Elf, initially armed only with a Staff and an Elven Wand, but as the game progresses you can acquire more powerfull weapons. The game introduced the ability to fly, look up and down and an inventory system that allowed characters to store items for later use.
Heretic is divided into five episodes - the original release included the first three, and the fourth and fifth were added in the Shadow of the Serpent Riders version of the game.
- Episode 1: The City of the Damned
- Episode 2: Hell's Maw
- Episode 3: Dome of D'Sparil
- Episode 4: The Ossuary
- Episode 5: The Stagnant Demesne