2025 - Kalmarunionen Wins Google Hackceler8 in Mexico City 🏆🇲🇽

Fourth time’s the charm!

After years of competing and qualifying through Google CTF — where the top 8 teams earn a place in the Google Hackceler8 finals — Kalmarunionen took home the Hackceler8 2025 trophy and cash prize in Mexico City!

This year, a dedicated group went all in on preparation for the finals — and it paid off in a major way.

Over three intense days, the team in Mexico kept their cool and delivered an impressive performance in the atypical #CTF format combining live hacking and gaming.

A massive shoutout to our Kalmarunionen teammates in Copenhagen, whose support was pivotal to securing the win. Once again, this experience shows us that hacking is a true team sport 🤝.

There are countless great moments behind the photos from this event — and with a little luck, one of the team members will write up a blogpost.

Until then, here’s your guide to the stream highlights now available on YouTube 👇

Stream Highlights

🎮 What is Google Hackceler8?
https://www.youtube.com/live/xN1W-cjqtKQ?t=14738s

🐛 The Last 10 Minutes of Finals (Memory Corruption Exploit)
https://www.youtube.com/live/xN1W-cjqtKQ?t=17612s

Fun note: one of the photos seen in this post has a monitor with tape on it, that was used right where this video starts to abuse the memory glitch.

👾 Final Boss & Celebration
https://www.youtube.com/live/xN1W-cjqtKQ?t=17902s

🎤 Post-Win Interview with Kalmarunionen (And Trophy Highlight)
https://www.youtube.com/live/xN1W-cjqtKQ?t=18157s

Thank You to Our Sponsors

A huge shoutout 🙌 to our sponsors — Industriens Fond, JN Data, Dubex & ICSRange — your support makes this possible.

If you’d like to support Kalmarunionen, reach out to Rolf Lunn or Morten Eskildsen on LinkedIn, or email us at sponsor@kalmarunionen.dk

What a Win 🏆 🥳