Black Mirror: Bandersnatch (2018) is a pioneering interactive film on Netflix, directed by David Slade and written by Charlie Brooker, focusing on a young programmer, Stefan Butler, in 1984 who loses control of his reality. The user-provided file string refers to a pirated, unauthorized version of this interactive narrative, typically hosted on defunct file-sharing platforms like Openload. While the original interactive experience allows for multiple branching storylines based on viewer decisions, unauthorized file versions cannot replicate these mechanics.