Certain Fathoms is a depth-crawl module for Mothership 1E. Crews descend into Welkin Campus—a sunken AI megacomplex on Prospero’s Dream—exploring shifting floors, clashing factions, and failed experiments. The dungeon changes every run.

Yes. Certain Fathoms is a third-party module written for Mothership 1E. You’ll need the core rules (available free online or in print at https://www.tuesdayknightgames.com/collections/mothership)

The core zine is a half-letter saddle-stitched book, 50+ pages (final count TBD). Expansions (like Hostile Takeover and Viewer Discretion) are additional half-letter zines, ~16–24 pages each.

- Randomized destinations, anomalies, and breaches for replayability - Four major factions (The Loopers, The Ladder, The Vox, The Custodians) - Notable NPCs like Miranda (your enigmatic AI patron) and Orestes (an unstoppable hunter) - Prototype cybermods and slickware to salvage and install - Procedures for running the depth-crawl

Both. Crews can dip into Welkin Campus for a single delve, or return across many sessions. The structure supports long-form play, with Miranda’s Basement as a hub between dives.

The module is designed for 1E, but can be run in 0E with the official, free conversion kit from Tuesday Knight Games (https://www.tuesdayknightgames.com/products/module-conversion-kit?variant=41294716174425).

No. While Certain Fathoms takes place beneath the Dream, everything you need is included. Prior knowledge is fun but optional.

- PDF pledges get fully bookmarked, hyperlinked digital files. - Physical pledges include the printed zine(s) plus digital. - Higher tiers may add expansions, patches, soundtrack, and more.

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