Crimsonland (2003) is a top-down shooter that shipped as a stripped DirectX 8 binary with zero symbols. I decompiled it with Ghidra, validated behavior with WinDbg and Frida, and rewrote it from scratch in Python/Raylib — 46,800 lines matching the original behavior faithfully. The write-up covers static and runtime analysis, reverse engineering custom asset formats, and the full rewrite process. Code is on GitHub and it's playable now via uvx crimsonland@latest

Very impressive, makes one wonder what do some companies have in private compared to public tools that we stitch together. E.g. you can combine LLMs with statical analysis/proving to get much better results.