Announcement

IrisCTF 2025 will be taking place from 4 January 2025 @ 00:00 UTC to 6 January 2025 @ 00:00 UTC. Registration will open in December at 2025.irisc.tf.


IrisCTF 2024 Highlights

Registered Teams

1786

Mean Team Size

2.96

Flags Captured

6547

CTFtime Rating

34.30/36.88

Challenging

96.72%

Educational

98.53%

Enjoyable

95.24%

Staff Rating

96.77%

Recommendation Score

4.17/5.00

Here's What People Had to Say

"Thank you for the CTF, all of the staff were incredibly kind and friendly. The Networks and OSINT challenges in particular were great."
- Anonymous Survey Response

"I just want to say that your website is the best CTF website I've ever seen! With the sound at each click, it's like a game menu."
- Anonymous Survey Response

"Great event. My second international CTF. I learned a lot by searching to solve challenges. Thanks for dedicating your time to make this event possible!"
- Anonymous Survey Response

Sponsors

Infra sponsored by goo.gle/ctfsponsorship, prizes sponsored by:




IrisCTF 2023 Highlights

Registered Teams

1087

Mean Team Size

2.78

Flags Captured

2949

CTFtime Rating

24.52/25.00

Challenging

96.51%

Educational

96.70%

Enjoyable

96.15%

Staff Rating

97.16%

Recommendation Score

4.44/5.00

Here's What People Had to Say

"Excellent hunt from start to finish. The RF section was also quite educational"
- Public CTFtime review

"Nice platform, great staff, fun CTF. Will come again."
- Public CTFtime review

"fun ctf! great challenges, both beginner and advanced"
- Public CTFtime review

Sponsors

Infra sponsored by goo.gle/ctfsponsorship, prizes sponsored by Sideliner.