Metal Gear Solid 2's source code has been leaked on 4chan

Original Article ↗ Hacker News Discussion ↗

Metal Gear Solid 2’s source code, apparently from the Vita/Xbox 360 HD editions, has leaked on 4chan, with many arguing it’s genuine due to the presence of original Japanese comments, cut content (including 9/11-related scenes), and proprietary tooling and asset formats. Commenters explore what this could mean for reverse engineering, decompilation with modern AI tools, and preservation or porting of the game, while also reflecting on the series’ famously dense, sometimes incoherent narrative and its now-eerie themes of AI, surveillance, and information control. The leak is compared to other recent game source leaks, raising legal, technical, and ethical questions around using and training on such material.

Authenticity of the Leak

  • Multiple commenters assert the leak is genuine, citing:
    • Presence of original Japanese comments about cut content and scrapped logic.
    • Code paths for known removed scenes (e.g., tanker escape, post‑9/11 cutscene).
    • Inclusion of raw assets and console-specific headers as strong authenticity signals.
  • A minority speculate it could theoretically be an AI-assisted reconstruction from binaries, but others insist current AI cannot convincingly reproduce a full 90s-era Japanese game codebase with tools, scripts, comments, and removed content.

AI, Decompilation, and Reverse Engineering

  • Some argue modern LLMs plus tools like IDA/Ghidra can decompile almost any game to functional, readable source, even suggesting “there is no longer any such thing as a closed-source binary.”
  • Others counter that:
    • Exact original source is fundamentally unrecoverable; many distinct source snippets can compile to identical binaries.
    • Automatic decompilation existed pre-LLM; LLMs mainly help with readability, naming, and restructuring, not raw correctness.
  • Real-world projects are cited:
    • N64 / GameCube decompilations and a Twilight Princess project rapidly approaching full coverage.
    • A Worms Armageddon reimplementation using LLMs and a large replay-based test harness, still taking months of intensive effort.
  • Debate over whether LLMs meaningfully improve “working compilation” vs. just human productivity and code cleanliness remains unresolved.

Story, Themes, and Cultural Impact of MGS2

  • Several posts discuss the final hours of MGS2’s plot, describing it as convoluted but thematically coherent, with:
    • AI-driven information control, fake digital realities, and predictive commentary on internet-era manipulation.
    • A blend of techno-explanations and outright supernatural elements, consistent with broader series tone.
  • Some find the narrative “incomprehensible” after the fact; others liken it to campy, soap-opera or John Carpenter–style fiction that’s compelling moment to moment but absurd on reflection.

Technical and Historical Value of the Leak

  • Expected benefits:
    • Better understanding of Konami’s proprietary systems: GCX scripting (a TCL-like fork), LA2 lighting format, and SDT audio, previously only partially reverse engineered.
    • Easier ports/mods given that this is the Vita/360 code, which is considered more approachable than original PS2 code.
  • There is interest in whether the leak is fully buildable for consoles and whether it includes or depends on official SDKs (left unclear).

Related Leaks and Comparisons

  • Mention of a recent Minecraft Legacy Console Edition leak on GitHub, noted as under-discussed despite the game’s popularity, with some skepticism about its practical value compared to existing Java decompilations.