The Filth

The Filth is one of the central antagonists in Secret World, a living disease that has its roots in the darkest of conspiracies and whose very existence is felt across the entirety of the gameworld - it is the single most prolific and dangerous "monster" humanity faces in the Secret World universe and is beyond the understanding of most humans.

Fought in numerous incarnations by multiple agents the Filth continues to play a major role in-universe and is best described as a malevolent, otherworldly cancer that is eating away at reality and replacing it with its own.