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Many aspects of the Slender Man mythos first appeared on the original Something Awful thread. One of the earliest additions was added by a forum user named "Thoreau-Up", who created a folklore story set in 16th-century Germany involving a character called Der Großman, which was implied to be an early reference to the Slender Man. The first video series involving the Slender Man evolved from a post on the Something Awful thread by user "ce gars". It tells of a fictional film school friend named Alex Kralie, who had stumbled upon something troubling while shooting his first feature-length project, "Marble Hornets". The video series, published in found footage style on YouTube, forms an alternate reality game describing the filmers' fictional experiences with the Slender Man. The ARG also incorporates a Twitter feed and an alternate YouTube channel created by a user named "totheark". As of 2013, "Marble Hornets" had over 250,000 subscribers around the world and had received 55 million views. Other Slender Man-themed YouTube serials followed, including "EverymanHYBRID" and "TribeTwelve".