I made this one for Brucon and North Star, about an AI gaining consciousness.
The code is open source… I just need to encrypt a challenge or two first. Hit me up if you want it hobby wise.
There is a theming systems allowing multiple skins on the same engine — a robotics theme and a Star Wars one — with the usual CTF categories (web, crypto, reverse, forensics, pwn, misc, terminal), teams, a leaderboard, and an admin tier. A few challenges live off the website entirely, spoken aloud or planted on hardware at the venue, not just in the code. I like to get crafty.
It was the main CTF at RBL and is coming back at Brucon.