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atproto

Slay the Spire 2: Atmosphere edition

I made a mod for Slay the Spire 2 that lets you publish your play data to your Atmosphere account & a website to show them off!

JP
Apr 17, 2026 · 2 min read

ately I've been thinking about PESOS, the Indieweb's approach to owning your own data on platforms that don't support it. "Publish Elsewhere, Syndicate to your Own Site."

I did a great job last week of not building one idea that snuck into my brain, but another crept in and I succumbed…

Steam's header image for Slay the Spire 2; various characters brandishing their weapons and looking up at the fiery spire towering into the sky.

What if Slay the Spire 2, the outrageously fun deck-builder/rogue-like game from @megacrit.com, published the details of your games ("runs") to your Atmosphere account?

"We can just do things, together" is a common refrain among atproto developers (as we call ourselves), and this experiment definitely stood on the shoulders of giants:

An in-game screenshot of a new dialog: the atproto-tracker "Publishing your run data to your Atmosphere account: @byjp.me"

So I had a crack at it! I learned a lot about developing game mods and writing C# from Claude (first time with both for me) but I've ended up in a place I'm very happy with as an experiment.

  1. 🧑‍💻 Download the mod or the installer (installers on the site, details on Github)
  2. 🔑 Get an app password & configure the installer/your config.json
  3. 🎮 Play!
  4. 🤩 Visit my site to see your run (you can see mine here)

That's it! The data is yours, and in your Atmosphere account. If you move providers (Bluesky -> Eurosky anyone?) it'll move with you and Just Work™.

You can even build your own site that's better than mine, and it'll work with everyone's StS2 runs, automagically. Hell, @megacrit.com could build an official one & it'd be instantly compatible!

The joy of building in the Atmosphere ☺️ What do you think? What would you add?

A screenshot of the website showing a run of mine; Act 3, floor 39 — showing all the cards in my deck and relics I've collected.

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Across the AtmosphereDiscussions
JP
JP@byjp.me

I built a mod for @megacrit.com's excellent Slay the Spire II which posts your run stats to your Atmosphere account, and a (simple!) website that shows them off! sts2.byjp.me/byjp.me/3miq... — it links in with @gamesgamesgamesgames.games too 🤩

2 replies on Bluesky