"Capture The Flag" (CTF) competitions, in the cybersecurity sense, are not related to playing outdoor running or traditional computer games. Instead, they consist of a set of computer security puzzles, or challenges, involving reverse-engineering, memory corruption, cryptography, web technologies, and more. When players solve them they get a "flag," a secret string which can be exchanged for points. The more points a team earns, the higher up it moves in rank.