SekaiCTF 2025

SekaiCTF returns for its fourth edition! While the overall difficulty has been designed to suit intermediate and advanced participants, we've also included beginner-friendly tasks to ensure newer players can join in and enjoy the experience. SekaiCTF 2025 will serve as dual prequalifier for MaltaCTF 2025 Finals and the 10th XCTF Finals. Discord: https://discord.gg/6gk7jhCgGX [+] Prize Pool ・USD $10,000 in cash and over $15,000 worth of prizes ・The top two teams will earn qualification for the following onsite events: ​ ​ ​ ​ ​ ​ ​ ​・The 10th XCTF Finals in China (2026): https://adworld.xctf.org.cn/ ​ ​ ​ ​ ​ ​ ​ ​・The inaugural MaltaCTF Finals in Valletta, Malta (2025): https://2025.ctf.mt/ ※ The first-place team may choose their preferred event; second-place team will qualify for the other. XCTF Finals covers full flights and accommodation; MaltaCTF Finals covers €450 per person for flights and full accommodation. [+] Sponsors ・OtterSec (https://osec.io/) ・Zellic (https://www.zellic.io/) ・Trail of Bits (https://www.trailofbits.com/) ・Sec3 (https://www.sec3.dev/) ・Vector 35 / Binary Ninja (https://binary.ninja/) ・Hack The Box (https://www.hackthebox.com/) [+] Partners ・Google Cloud (https://cloud.google.com/) ・XCTF League ・Friendly Maltese Citizens