Great use of the title and I really enjoy how technical the text gets. Feels like a good way to give the DM some jargon to talk to the players when they interact with the visitors.

I agree with the others that mentioned that a section about the visitors and how they turn into diminished at the start would’ve been nice. Maybe you could compile the description of the decontamination rooms into the same entry to save space, since the text repeats.

Some minor additional notes:

• It’s not clear if the Predictive Armor and the Brutal abilities are already calculated into the stats, or if they should have an activation.
• In Shadowdark, looking for secret doors finds secret doors by default. Maybe what’s really missing is something that telegraphs their presence and prompt the players to search for them. If I was a player in this, I don’t think I would think about searching for a secret door in a decontamination chamber anyways.
• Same for the WIS check to identify Diminished as Visitors. Shadowdark doesn’t usually do knowledge checks, and I feel like you already do a good job to describe them so players can figure out what’s happening. From experience, it’s usually more rewarding letting the players guess at these things and then finding some information that proves them right and make them feel smart then just telling them the answer, especially since there’s absolutely no reason a character would’ve known this beforehand.

Heya!

I'm organizing a collaboration between all of the Shadowdark Appx. N creators on Discord. If you're interested look me up in the SD Discord or reach out in DMs.

solid scifi gig of the pulpiest kind, clear text, looks like a lot of fun

Cool sci-fantasy crawl with interesting takes on how to meld the two. 

What I thought worked well

• I like the concise big text. Less is more and it was very easy to read. 
• Visitors-to-Diminished and the usage of gases is cool
• I like the premise and how it sets up a lot of fantasy in the world through sci-fi, however...

What I thought could be improved

• ... Something felt a bit at odds thematically. I went in with a fantasy state and left with a sci-fi state, not expecting it. Example is using the Black letter font to write "computer", or describing scientific terms but then also abstracting what a screen is. It can work but to me I felt split.

Cool lab crawl! I especially enjoyed the random encounter with trapped gases to make torches explode and the laboratory with the owlbear/ochre jelly/chimera.

Very nice dungeon. Crawling this strange quasi-space station should be fun. My only nitpick ist, that all new creature types are named in text, before it is explained what they are (esp. Diminished) .

A cool use of sci-fi in a fantasy setting, just like in old times! I especially like the descriptions of modern technology. The ending's also good, leaving a confused party of crawlers in the mountains, with treasures they have no remembrance of getting. 

There are a couple novel mechanics here, my favorite being the "using food" table. Rerolling reactions checks is such a simple, elegant ruling to what food might do and not one that's ever occurred to me. That's worth kudos!

The adventure itself is a convincing mesh of sci-fantasy and makes me think I should have gone a little farther future with my own entry.

Thank you for your entry!

This was fun to read. I love the fusion of sci-fi and fantasy here. Descriptions are effective and brilliant. The map design is cool, and layout works. Overall, very solid. Amazing work!