Sat, 25 Oct. 2025, 02:00 UTC — Mon, 27 Oct. 2025, 02:00 UTC
On-line
A osu!gaming CTF event.
Format: Jeopardy 
Official URL: https://osugaming.sekai.team/
This event's weight is subject of public voting!
Event organizers
Welcome to the second edition of osu!gaming CTF!
osu! (https://osu.ppy.sh/) is a fast-paced, precision-oriented rhythm game where players click, slide, and spin their way through difficult beatmaps. With osu!gaming CTF, we're bringing that same excitement to the world of capture-the-flag.
In this jeopardy-style CTF, every challenge is themed around osu! and popular rhythm games. Whether you're a rhythm game veteran looking to try your hand at hacking, or a CTF competitor curious about the osu! community, osu!gaming CTF offers a fun learning experience that bridges both communities.
Join our Discord server (https://discord.gg/pJ5VpFKduN) to connect with other participants, find teammates, and stay updated on announcements. Happy hacking!
[+] Team prizes
The top 5 teams will select from the following pool of 5 "bundles", in order of placement:
・Bundle A: A 6-foot giant goose plush*, osu! shirt (any variant), 2-month osu!supporter (x3)
・Bundle B: A really cute axolotl plush*, osu! shirt (any variant), 2-month osu!supporter (x3)
・Bundle C: osu! shirt (any variant), osu! socks, 2-month osu!supporter (x3)
・Bundle D: osu! deskmat, 6-month osu!supporter (x2), osu! sticker set / certified
・Bundle E: 2-month osu!supporter (x5), osu! sticker set / certified (x2), osu!buttons (x2)
*These items can only be shipped to the United States or Canada.
[+] Writeup prizes
After the competition, a 1-week writeup competition will run.
・Top 5 writeups: 2-month osu!supporter
・Best unintended solution: Wacom CTL-472 drawing tablet, 2-month osu!supporter