An appearance by this infamous Mythos race, which some Keepers recommend expanding into a larger role.

The campaign includes encounters with at least two Great Old Ones and a mysterious "saintly" child leading a cult.

Reviews of At Your Door are notably mixed. Some critics consider it the best of the line for its authentic 90s feel and imaginative scenarios. However, others find it a "mess" of disparate elements—such as Cthonians, a shoggoth named "Mr. Shiny," and bio-attacks—that feel loosely connected without enough forethought. Where to Find It

A highly-praised chapter involving a monster-infested farm that challenges investigators to contain a rapidly spreading threat.

The campaign is known for its diverse and often bizarre Mythos elements, ranging from biotechnology to cosmic deities.

Subtitled "A Campaign of Terror and Madness in the Days to Come," the story centers on , a wealthy environmental organization that hires the investigators to find Dr. Peter Tait , a microbiologist who vanished after reporting irregularities in his research.

The original physical book included 23 pages of perforated pull-out player handouts to enhance immersion. Critical Reception

While the original 1990 print edition is a collector's item, digital versions are often sought by modern players.

Out-of-print titles like this are sometimes available via digital storefronts such as DriveThruRPG.