HeXen: Descent into the Abyss is the recent entry in my Heretic/HeXen mappack series. Descent Into the Abyss serves as a prequel to explain some events in Tower of Chaos: Special Edition that would otherwise remain unanswered until the next sequel to the story that picks up where my third mappack, A New World ended. This may sound like you need to play my previous works before tackling this, but don't worry because the story told here is still self contained enough that you will understand it.