Halo: Combat Evolved now runs in a web browser with 128-player multiplayer. Lego Racers — the 1999 kart racer, is playable on Android, Steam Deck, and iPhone via Safari. And The Legend of Zelda: Ocarina of Time boots on modern Windows PCs without emulation, thanks to Ship of Harkinian: a full reimplementation from reverse-engineered source code. None of these are official releases. All are community-built, open-source, and unlicensed. They’re also live right now. Not as demos or proofs of concept, but as functional, cross-platform releases anyone can download or run instantly in-browser. This isn’t nostalgia packaging. It’s infrastructure-level repurposing of 20-year-old games, rewritten, recompiled, and redeployed across hardware Nintendo, Microsoft, and LEGO never targeted. OpenHaloCE works on Windows, Linux, Android, and in Chromium-based browsers. Step On It. NavigatorSharp’s Lego Racers recreation, ships native builds for Mac, Windows, Linux, Android, and iOS (via web app wrapper), plus browser support on desktop and mobile. Ship of Harkinian requires no GameCube disc or BIOS dump. It compiles from decompiled assets and logic, and runs at high frame rates on mid-tier laptops. These projects rely heavily on AI-assisted decompilation tools. Used to reconstruct readable C code from compiled binaries, but human developers remain central: verifying logic, fixing edge cases, and rebuilding rendering pipelines. That hybrid workflow has slashed the time needed to decompile and recompile complex titles. Where earlier efforts took years, recent ones like Halo CE and Ocarina of Time landed in under 18 months. Legal status remains ambiguous. Nintendo has issued takedowns against some fan servers and ROM distribution sites, but has not targeted the decomp projects themselves. Which avoid copyrighted assets and require users to supply original game files. Microsoft has stayed silent on OpenHaloCE. LEGO hasn’t commented on Step On It. No pricing. No storefronts. No DRM. Just GitHub repos, itch.io pages, and links shared in Discord servers. You bring the original game file, if you own it. And the project does the rest. What comes next? Multiple teams are now decompiling Super Mario 64 and Star Fox 64. A PS2-era Final Fantasy X recompilation is in early alpha. And browser-based ports of PlayStation 2 and GameCube titles are being tested on WebAssembly backends, meaning more classics could soon run without downloads, plugins, or emulators. Ship of Harkinian’s latest stable release dropped October 3. OpenHaloCE hit version 1.0 last week. Step On It launched its first public beta on September 28.