In January 2012, an anonymous image board post read: 'We are looking for highly intelligent individuals.' What followed was a labyrinth of steganography, cryptography, ancient numerology, and physical posters planted in cities from Warsaw to Seoul. Almost nobody solved it — and the final 2014 puzzle, a 58-page cipher called the Liber Primus, remains unbroken to this day.
The canonical overview of all three puzzle rounds (2012-2014), the cryptography and steganography involved, and the leading theories about who built it.
The definitive documentary explainer that turned Cicada 3301 into mainstream internet lore, walking through every twist of the 2012 puzzle chain.
Contemporary reporting from January 2014, written as that year's round was actively kicking off — captures the mystery unfolding in real time.
A crowd-sourced archive of every clue, decoded page, and timeline from all three puzzle rounds — the rabbit hole's own rabbit hole.
A catalog of real-world poster sightings in Warsaw, Paris, Seoul, Sydney, Seattle, and New Orleans — the physical, ARG dimension that made this more than just an online puzzle.
A profile of Swedish solver Erik Eriksson, detailing the bizarre mix of steganography, Mayan numerology, and cyberpunk fiction needed to get anywhere near the end.
A more recent investigative angle examining the puzzle's hosting infrastructure and the conspicuous absence of procurement records compared to known intelligence-agency recruiting campaigns.
A 2024 retrospective offering a second narrative voice on the case, more than a decade after the last puzzle was posted and still officially unsolved.