The first TeleChallenge (npub145v…23qe) started as the Telephreak BBS Challenge. I built a puzzle that strung together a challenge on a floppy disk with an actual phone based BBS (super old-school, the one I ran in high school and still full of messages and warez from back then) that could only be reached by dialing a local room extension at the Alexis Park. Getting the extension required a live social engineering challenge.
You could get a floppy disk from me if you were under 25 and it was your first DEF CON (npub1dqd…8xy4). I just made the game and did it, with the help of Paul Rixon (npub1t88…6nxq) who donated space in his room. I wasn't even thinking of it as a contest. More for fun, a way to see if anyone could solve it, and a way to meet smart people we could invite to the Telephreak party.
Grifter noticed. He made the case with Jeff Moss (npub12ts…x422) that a young couple who came to their first DEF CON and spent it solving an epic puzzle should get a black badge. They did, and they also got a coveted Telephreak party invitation.