The campaign leans heavily into biological horrors, mutations, and twisted science, blending classic Lovecraftian tropes with modern body horror.
The last train home doesn't stop at the station. The lights flicker. The passengers vanish one by one. The train enters a tunnel that exists on no map, leading to the Dreamlands or a pocket dimension of Nyarlathotep
This article explores the history, themes, and gameplay structure of At Your Door , and provides legal guidance on obtaining its PDF version for your gaming table. What is At Your Door ?
Set primarily in the fictionalized city of , and extending into Toronto, Canada, this campaign features six interlinked scenarios. Unlike many older supplements, it leans heavily into contemporary themes like environmentalism, scientific ethics, and the influence of televangelists.
Because the physical book has been out of print for decades, physical copies can command high prices on the secondary market (such as eBay or specialized RPG trade groups). Fortunately, digital archiving has made accessing this classic book much easier. Official Digital Retailers call of cthulhu at your door pdf
Published by Chaosium in 1990, At Your Door is a multi-part campaign designed for Cthulhu Now (the modern-day ruleset variant for Call of Cthulhu 4th and 5th editions). Written by L.N. Isinwyll, Mark Morrison, Barbara Manui, and Chris Adams, the book consists of a series of interconnected adventures set in the contemporary United States.
One of the most distinctive features of At Your Door is its non-linear plot structure, which was unusual for its time. The book's introduction stresses that chapters are organized by theme rather than chronology, encouraging players to return to earlier locations as they uncover more information.
| Weapon | Base Range | Damage | Shots | Malfunction | | :--- | :--- | :--- | :--- | :--- | | | 15 yrds | 1D10 | 15 | 100 | | .38 Revolver | 15 yrds | 1D10 | 6 | 99 | | 12-Gauge Shotgun | 10 yrds | 4D6 / 2D6 | 2 | 99 | | AR-15 Rifle | 80 yrds | 1D10+2 | 30 | 99 | | Sniper Rifle | 150 yrds | 2D10+4 | 5 | 99 |
Call of Cthulhu relies heavily on player handouts (newspaper clippings, corporate memos, medical reports). A good PDF will have clear, legible versions of these documents that you can easily print out or share on Virtual Tabletops (VTTs) like Roll20 or Fantasy Grounds. The passengers vanish one by one
| Source | What You Get | Price | |--------|--------------|-------| | | Quick-Start Rules (includes The Haunting ) | Free (legal PDF) | | DriveThruRPG | Starter Set PDF, Keeper Rulebook PDF | $10–30 | | Humble Bundle | Regular bundles with 10+ scenarios | ~$15–25 |
If you prefer physical props, you can print only the handouts and maps you need, leaving the rest of the campaign on your tablet or laptop. Key Themes of the Campaign
The campaign often focuses on the underbelly of cities, demonstrating that the Cult of Cthulhu thrives in neglected areas.
– A race against time as the true scale of the cosmic threat emerges. Set primarily in the fictionalized city of ,
Facing off against localized Mythos entities like Chthonians. Survival & Resolution
Here is the current reality: Unlike many of their other classic supplements which have been beautifully scanned and re-released digitally, this campaign has yet to receive that treatment. This is the primary reason for its scarcity and high demand. Because it is not currently sold as an official PDF, circulating copies you may find online are almost certainly unauthorized scans.
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Instead of forcing players down a strict chronological "railroad," the book allows investigators immense freedom of action. Players will frequently find themselves circling back to previous locations or chapters as new clues emerge, reassessing earlier events with a fresh—and increasingly terrified—perspective. Themes Ahead of Their Time