June 7, 2026
Unreadable code, undeniable drama
The 29th International Obfuscated C Code Contest (IOCCC) 2025 Winners
Fans cheer genius code, roast the maze-like site, and argue whether AI should join the chaos
TLDR: The 2025 winners of the internet’s most famous “confusing code” contest are out, with organizers saying entries were both numerous and unusually strong. Commenters were more obsessed with the chaos around it: praising a Game Boy-shaped entry, mocking the hard-to-navigate website, and debating whether AI belongs in the madness.
The winners of the 2025 International Obfuscated C Code Contest are out, and yes, this is the annual internet talent show where programmers compete to write code so twisted it becomes art. Organizers say this year had near-record levels of entries and unusually strong quality, even after last year’s big comeback from a long break. They’re also leaning harder into community fun, with YouTube award segments, extra challenge tasks, and invitations for fans to send in improvements through GitHub.
But the real fireworks are in the comments, where readers instantly turned the contest itself into the joke. One of the loudest reactions? The website is apparently so confusing that people joked it deserves its own prize for obfuscation. “The website itself is obfuscated,” one commenter groaned, which honestly feels very on-brand. Another crowd favorite was a Game Boy emulator entry, with fans losing their minds because the code reportedly looks like a Game Boy. That got the biggest applause, with one user basically delivering a standing ovation through text.
Then came the mini culture war: should AI be allowed in a contest about bizarre, unreadable code? One commenter joked that large language models might be perfect for this level of confusion, while another fired back that the rules already allow AI-assisted work. And hovering over everything was one spicy complaint that the contest gives out so many awards it feels like “modern education.” In other words: the code is messy, the opinions are messier, and the internet is having a great time.
Key Points
- •The article publishes links to the 2025 IOCCC29 winning entries and says readers can access compilation details, source code, author remarks, and a downloadable tarball.
- •IOCCC29 reportedly had near-historic submission volume and quality, with participation levels similar to IOCCC28 despite the earlier 2020-2024 hiatus no longer being unique.
- •Organizers documented contest-closing, judging, winner selection, website updates, and live-show production processes, and say this improved contest operations.
- •Winning entries now include optional fun challenges in the judges’ remarks, and the article invites readers to contribute solutions or improvements via GitHub pull requests.
- •The final rules used for the contest were identified as 2025 rules version 29.15 dated 2025-12-02, and IOCCC30 is planned to open near the end of 2026 and close around the end of Q1 2027.