Pandion Games
Substratum Protocol
When the anomaly appeared at the Earth's core, the Substratum Protocol was initiated. You are the best and brightest scientists we have left, our last hope to stem the apocalypse. You are the Substratum Expedition Team. Descend. Learn. Survive.
A solo+ survival mystery RPG using step-down dice and card draw mechanics, Substratum Protocol is playable as both a solo game or guided by a GM for 2–6 players.
Don't forget to grab your Expedition Journal and Character Folios!
With players taking on the role of Earth's best remaining scientists, Substratum Protocol is our entry into the Deep Delving Mystery genre (like Subnautica and In Other Waters).
On their grueling journey to the center of the Earth, members of the Substratum Expedition will overcome challenges, gain clues and knowledge of the anomaly, discover creatures, aliens, cosmic horrors, and ultimately assemble their final hypothesis to overcome the apocalypse looming before them.
The game intertwines hard science fiction with the inescapable, unknowable horrors of an anomaly tearing apart reality.
- Purpose-built for solo and multiplayer mysteries
- Unique dice and card draw resolution mechanics
- Take special Actions whose outcomes can chain together
- Collect cards during Skill Checks to power your suit's abilities
- A self-contained story, with unlimited possibilities and outcomes
- Quickly build unique and interesting characters at the table * 36 unique clues to discover, 36 questions to answer
- 10 sectors to explore, each one stranger than the last
- 120 events and encounters to surprise and stump your players
- Build the Last Hypothesis: When they have learned all they can, the scientists must pour over their knowledge of the anomaly, construct the Last Hypothesis and enact their plan. Will it be enough?
88pg, A5-sized, softcover, full color
UPC/ISBN: 9781963083071
Product Information
Due to the nature of collectible items and ever changing market demand, we are unable to cancel pre-orders on ratio variants and select other items (1 per store variants, exclusive covers, ect) for a refund.For preorders on regular open order comics (the majority of which are normally cover price), we can cancel preorders and refund with a store credit that can be used in our brick and mortar stores or at thirdeyecomics.com
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Cover art for Comics on our website is provided to us at the time of solicit. While we do our best to keep these images up to date; some covers may be subject to change!
At Third Eye, we ship thousands of comics every week, and we know condition matters. Whether you're reading, collecting, or grading, we want you to feel confident when a Third Eye package arrives.
This policy outlines our standard for new release and shipped comics, and the industry-standard guidelines we follow.
OUR STANDARD
Books without a stated grade will be offered as Near Mint 9.4 or better. We do not guarantee 9.8 condition on any book unless specifically noted.
We use industry-standard grading guidelines from:
- CBCS Comic Grading Scale
- Overstreet Comic Grading Standards
- CGC grading standards
If you're new to comic grading, the resources above are a great place to start.
WHY WE DON'T GUARANTEE 9.8
Modern comic printing is an imperfect process. Books are printed in massive
runs, bound at high speed, and shipped in bulk to retailers. Even brand
new books off the truck will exhibit minor production characteristics,
and that's normal, and consistent with industry standards across every
retailer.
A 9.8 grade represents near-perfection, and the reality is that not every printed book qualifies for that grade no matter where you buy it from.
We can absolutely commit to NM 9.4 or better. We cannot commit to 9.8 on every book, because that's not how comics are made.
WHAT QUALIFIES AS NM 9.4
Per industry standards, a book may exhibit the following minor characteristics and still grade as Near Mint 9.4, as long as there's no accumulation of defects:
Bindery characteristics:
- Minor to moderate corner tears
- White edges along the spine (common on most modern printings)
- Covers slightly offset from interior pages (common on cardstock covers)
Printing characteristics:
- Slight color rub on back covers
- Small paper wrinkles present from the paper roll prior to printing
- Wavy paper texture from the printing process
Spine characteristics:
- 2-3 small color-breaking spine ticks
- Minor non-color-breaking spine dings
These are normal modern production characteristics, not damage from handling or shipping. They are present on books across the industry, regardless
of retailer.
OUR RETURN & EXCHANGE POLICY
We do not accept returns or exchanges on books that meet our NM 9.4 or better standard.
We will replace or refund:
- Books damaged during shipping (clear shipping damage, not pre-existing print characteristics)
- Books that fall below NM 9.4 standard (significant spine damage, major creasing, tears, etc.)
- Wrong cover or wrong issue shipped
For premium variants (1:25, 1:50, 1:100, 1:250, 1:500 incentive covers, signed editions, exclusive variants), we apply enhanced QC during pull and packing. If a premium variant arrives outside our standard, contact us within 7 days of delivery and we will work with you on a replacement.
QUESTIONS?
If you have questions about a specific book or want to learn more about comic grading, our team is happy to help. Reach out to service@thirdeyecomics.com.
We appreciate your trust in Third Eye Comics, and we're committed to delivering books that meet the standards both you and we expect.

