decomp.dev Shuts Its Leaderboard After AI Flooding: 'Burn Tokens to Make Number Go Up'

A small corner of the internet that preserved video game history has become the latest casualty of capable AI. decomp.dev, the site that has centralized progress tracking for volunteer game decompilation projects since 2024, announced on October 15 that it is shutting off its main index and refusing new projects. Existing project pages and historical data remain online.

Matching decompilation is the craft of reconstructing a game's original source code in C so that compiling it reproduces the original machine code byte for byte. It is what allows classics like Super Mario 64 to run natively on PCs, and it used to take teams of skilled volunteers years per game. The site's pseudonymous administrator, Encounter, writes in a post titled "Sunsetting decomp.dev" that frontier models crossed a threshold in early 2026, when Opus 4.6 and GPT-5.4 appeared to already know the community's tools without being told.

The current generation pushed it further. Encounter describes GPT-6-Astra-class models as "significantly better at following complex directions, cross-referencing resources for symbols or debug information, and writing natural code," and as "exceptionally good permuters" that write small scripts testing many source variants until one compiles to an exact match. With long-horizon coherence, lower cost and higher speed, a task that once defined a community now costs pocket change.

What broke, according to the post, was social rather than technical. Projects listed on decomp.dev were open source to invite contributors, but the result was "hostile forks" in which drive-by actors finished human-led projects with AI and claimed the result, and opportunists racing to ship half-working PC ports built on decompilations they never helped write. The progress bars, designed to keep volunteers motivated when every fraction of a percent took real effort, became what Encounter calls "a hollow numbers game" for people who "burn tokens to make number go up."

Notably, the administrator declines to ban AI outright, saying it "can help tremendously when used correctly" and that one hobbyist cannot define or police "slop" across hundreds of projects. The site's own code, written entirely by humans, has never carried an open-source license, so the leaderboard cannot simply be forked elsewhere. A companion AI decompilation tool, decomp.wtf, was discontinued by its creator after community backlash.

The story resonates beyond retro games. 404 Media reports AI-built clones of paid software such as Adobe's Creative Cloud apps and Microsoft Office circulating in recent days, while small game developers describe AI "clean room" copies of their work appearing. decomp.dev is a first-hand account of what happens to a craft economy when the craft gets cheap: the artifacts survive, but the community that made them may not.