Kokiri Forest from Ocarina of Time rebuilt inside Valheim

The full story

A Valheim mod that rebuilds Kokiri Forest and the Deku Tree from The Legend of Zelda: Ocarina of Time as a playable Valheim world. It ships no Zelda files: the player points it at their own ROM, and it uses the zeldaret/oot decompilation to pull out level geometry, collision, actor positions, text, cutscene cameras and music, then rebuilds them with Valheim's terrain, textures, plants and lighting. The maker calls it a remaster rather than a 1:1 copy.

Claude wrote all of the code over about five days. It wrote a small N64 display-list interpreter to turn the models into textured meshes, converted the collision floor into Valheim terrain, ported Link's moves, the Deku Babas, Skulltulas, Deku Scrubs, Gohma larvae and the puzzles from the decompilation's C into the C# mod, replays the intro and cutscenes frame by frame, and renders the music from the ROM's sequences and soundfonts. A command file inside the mod let Claude teleport, take screenshots and read the log, so it tested much of it on its own.

The intro, Kokiri Forest with its original NPC text, the Kokiri Sword and the Deku Tree up to burning the web are playable. Queen Gohma and everything after is not done yet, it is single-player only, and it currently needs the EU GameCube Collector's Edition ROM plus Linux or WSL for the build step.