In January 2012, a cryptic post appeared online, seeking ‘highly intelligent individuals.’ What followed became known as Cicada 3301, the hardest puzzle on the internet. One that took players across the online space and then, to real-world locations. After two years of enigmatic posting, it disappeared - and was never seen again. The final puzzle was never solved. Nearly a decade later, Tommie Trelawny and Nicky Anderson decide to take on Cicada 3301 for themselves. Who was behind these mysterious puzzles? And what did they want to achieve?

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