Nocturnum: Eternus was a prior, short-lived sequel campaign to the original Nocturnum campaign. Like Rebirth, it was set in Pittsburgh and involved a new group of investigators working for Anita and Matthew at Blake Investigations.

This crew of adventurers included Darrek, Harlan, and Sam, all of whom have carried over in some respect to the current campaign, as well as an Atlantean immortal, a werewolf, a vampire slayer and a fae from the Seelie Court. The campaign was short-lived, lasting only one season and a few months (12 episodes).

It dealt largely with an evil Atlantean’s efforts to create tainted immortals, as well as the introduction of Club Apocalypse and the freeing of Cassilda from her island prison, all events that have carried over to the current campaign.