Monopoly-like board with fields for the categories web, reverse engineering, miscellaneous, cryptography and binary exploitation

Collect all the flags in:

GPN CTF 2025

Hosted by KITCTF

Overview

  • Release date: June 20, 10:00 UTC
  • Object of the game: The object of GPN CTF 2025 is to be the team with the most $ points.
  • Number of players: Unlimited team size
  • Game materials: Challenges from the categories cryptography, binary exploitation, reverse engineering, miscellaneous and web
  • Type of game: Jeopardy style CTF
  • Audience: Ages 6 to 99
  • Duration: 36 hours

This game is still in development and will be released soon.

The KITCTF team invites you to a game of CTF at this year’s GPN. The game starts at June 20, 10:00 UTC and ends at June 21, 22:00 UTC. You can participate online or come to the game table at the GPN.

From casual players to board game enthusiasts, whether you go solo, team up or bring all your friends - everyone is welcome to participate.

Sponsors

If you are interested in supporting the CTF, please contact us for more details.

Prizes

To be announced at a later date.

Rules

  • We will primarily use Discord for communication (join the Server now).
  • Each player may only participate in one team. The number of players participating in a single team is not limited. You may share one account to access the contest platform.
  • If you have a question or a problem, please reach out to us (e.g. if a seemingly valid flag gets rejected).
  • The flag format is GPNCTF{.*} (only printable ASCII characters), unless specified otherwise in the challenge description.
  • We use dynamic scoring. That means, challenges which are solved more often will be worth less points. Every team that solves a challenge is awarded the same amount of points, the scores will be updated dynamically.

The following behavior is strictly prohibited:

  • Any behavior that affects the fairness of the contest.
  • Posting or sharing task solutions or flags.
  • Attacking the contest infrastructure or systems of organizers or other participants. Only the servers mentioned in challenge descriptions or resources are in scope. The event is hosted during the GPN23, but attacking GPN infrastructure is strictly prohibited.
  • Exploiting vulnerabilities in the contest infrastructure or purposefully breaking challenges for others. If you find such a vulnerability, please report it to us.

GPN23

Play online or in person at the GPN23. The 23rd Goulash Programming Nights are one of the biggest events of the European hacking scene. It is hosted by the local Chaos Computer Club Community, the Entropia e.V., and is open to everyone, not only “digital natives” and nerds. Program-wise, the GPN will feature a variety of talks with both technical and social topics. As the name implies, it also offers a space for programming and tinkering as well as presenting and discussing projects and topics. And of course, the famous goulash and other freshly prepared dishes will keep you satiated and strong while hacking!

We will host the CTF live at the GPN. Feel free to visit us there for information about CTFs and getting to know the team behind the competition.