Image: github.com · GitHub repository card for nexost/sts2-pres-mod
A Slay the Spire 2 mod with two new characters built by decompiling
Claude Code decompiled Slay the Spire 2 and built a mod with two characters, 176 cards, balance bots and a trailer.
Credits
Earliest dated source:
The full story
The project began as a test of whether Opus 5.5 could reverse engineer game code. Claude Code decompiled the game, worked out what a mod has to patch, and built a multi-character framework with an installer and uninstaller.
It designed 176 cards against numbers mined from the base characters, implemented them in C# with Harmony patches, and ran a balance bot over 300 games against two existing characters. Art was generated locally in ComfyUI, and a director bot recorded a trailer in 4K. The poster steered it mostly from a phone using Remote Control.
How it was done
Tools
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: Opus 5.5 is nuts. It built a complete playable Slay the Spire 2 mod: two characters, balance bots, lReddit poster: exosticPosted
The maker's post on r/ClaudeAI.
If it disappears: archived copy of Reddit: Opus 5.5 is nuts. It built a complete playable Slay the Spire 2 mod: two characters, balance bots, l (opens in a new tab)
- The code: github.comRepository account: nexost
The project on GitHub.