Mythos: The Beginning is a survival horror/adventure role playing game based on the pulp-horror and monster movies of the 1930s. Set in London in 1934, Mythos tasks you with creating your own paranormal investigator from scratch and guiding them through a frightening exploration of the infamous Harborough Asylum. Three young university students have vanished while attempting to conduct a scientific survey of this dreaded place, and it's up to you to find them! Throughout the night you'll discover that Harborough Asylum's reputation is more than an urban legend, and you'll have to fight for your life against otherworldly Lovecraftian foes.

Harborough Asylum is an abandoned mental hospital located on the outskirts of London. It was established in 1882 and soon built up a reputation as London's harshest institution thanks to its brutal and controversial treatments. After a string of mysterious patient deaths, said to number more than 40 victims, it was finally closed down during World War I and has been disused ever since. Despite this turn of events, Harborough Asylum remained one of England's most infamous sites, soon becoming the subject of an alarming number of local ghost stories. Now Harborough Asylum is a place where only the most bravest (or foolish) men would dare to tread.

You play as a renowned paranormal investigator, best known for solving a famous missing persons case several years ago. Tonight, Professor Harrison Blacktail, a mysterious academic somehow connected to the asylum's past, has turned up in your hotel room at the Imperial Arms. He has commissioned you for the most dangerous case of your career: search for three missing students inside Harborough Asylum, and discover whether the terrifying legends are true.