2013found by harvest
30C3 CTF
1 challenge with 1 published solution between them. No writeups were ever filed against this event's listing, so its solutions were found in public repositories instead. Each link is pinned to the commit it was read from.
The event listingUncategorised1
The upstream scoreboard did not say, so neither do we.
Bigdata
1 official solutionAlso written up in: DhavalKapil/ctf-writeups