Cicada 3301A series of elaborate online puzzles sent solvers through cryptography and global clues.9 min / Easy Polybius (urban legend)An alleged arcade game became one of the internet's favorite cabinet myths.7 min / Easy Max Headroom signal hijackingA strange masked figure interrupted Chicago television broadcasts in 1987.7 min / Easy The BackroomsA liminal image and short caption grew into a collaborative horror mythology.7 min / Easy Slender ManAn internet-born figure spread from forum images into fiction, games, and crime reporting.8 min / Medium Webdriver TorsoA mysterious YouTube channel posted thousands of abstract test videos.7 min / Easy UVB-76A Soviet-era shortwave station has broadcast a persistent buzzing signal for decades.7 min / Easy Numbers stationShortwave broadcasts of voices and codes suggest old-school espionage in plain hearing.8 min / Easy 11B-X-1371A viral video full of plague imagery and coded messages invited crowdsourced decoding.7 min / Easy Candle CoveA creepypasta about a half-remembered children's show became a modern folklore seed.6 min / Easy Local 58An analog horror web series turns public-broadcast aesthetics into cosmic dread.7 min / Easy Ben DrownedA haunted-game creepypasta became a defining story of early web horror.7 min / Easy PetscopA fictional unreleased game unfolded as a long-form YouTube mystery.7 min / Easy Marble HornetsA web series helped shape found-footage horror on YouTube.7 min / Easy This ManA dream-figure hoax spread through forums, posters, and viral sharing.6 min / Easy John TitorA forum poster claiming to be a time traveler became a lasting internet legend.7 min / Easy Time CubeA notorious website presented an idiosyncratic cosmology in dense, unforgettable prose.6 min / Easy Satoshi NakamotoBitcoin's pseudonymous creator remains one of the internet age's biggest identity mysteries.8 min / Medium BitcoinA cryptographic currency experiment grew into a global financial and cultural force.9 min / Medium Silk Road (marketplace)An online black market forced new questions about anonymity, law, and cryptocurrency.9 min / Medium Mt. GoxA major bitcoin exchange collapsed after hacks, losses, and accounting failures.8 min / Medium UsenetA pre-web discussion system shaped online communities, culture, and archives.8 min / Easy Internet OracleA playful question-answer service became an artifact of early internet culture.6 min / Easy Project ChanologyAn online campaign against Scientology marked a turning point for Anonymous.8 min / Medium Anonymous (hacker group)A loose online collective moved from imageboard culture into activism and attacks.9 min / Medium LulzSecA short-lived hacking group became infamous for high-profile breaches and showmanship.8 min / Medium Morris wormAn early internet worm revealed how fragile networked systems could be.8 min / Medium ILOVEYOUA worm disguised as a love letter caused global computer disruption.7 min / Easy ConfickerA resilient computer worm infected millions and sparked international response.8 min / Medium WannaCry ransomware attackA ransomware outbreak exploited leaked tools and disrupted systems worldwide.8 min / Medium Dead Internet theoryAn online theory claims that automated content and coordinated activity have displaced much of the human web.8 min / Easy Lost mediaRecordings, broadcasts, games, and websites can vanish, leaving communities to reconstruct incomplete cultural archives.8 min / Easy ElsagateDisturbing videos disguised with familiar children's characters exposed weaknesses in recommendation and moderation systems.9 min / Medium Momo ChallengeA sculpture's image became attached to a viral moral panic about an online challenge that evidence could not substantiate.8 min / Easy Blue Whale ChallengeReports of an online self-harm game spread globally despite serious questions about how much of it existed.9 min / Medium 2012 phenomenonOnline speculation transformed the end of a Maya calendar cycle into predictions of global catastrophe.8 min / Easy Celebrity Number SixInternet researchers spent years identifying the final unknown face on a piece of printed fabric.8 min / Easy I Love BeesA damaged-looking website unfolded into an alternate reality game promoting Halo 2 through calls and hidden clues.8 min / Easy Ong's HatA fictional conspiracy spread through photocopies, bulletin boards, and early online communities as an immersive legend.8 min / Easy Perplex CityA global puzzle hunt mixed collectible cards, websites, live events, and a cube hidden somewhere in the real world.8 min / Easy StuxnetA highly sophisticated computer worm sabotaged Iranian nuclear centrifuges while concealing its effects.10 min / Medium GhostNetResearchers uncovered a cyberespionage network that had infiltrated government and diplomatic systems around the world.8 min / Medium Toynbee tilesCryptic linoleum messages embedded in city streets inspired decades of documentation and theories about their creator.8 min / Easy