Total recall

"We Can Remember It for You Wholesale" is a short story by American writer Philip K. Dick, first published in The Magazine of Fantasy & Science Fiction in April 1966. It features a melding of reality, false memory, and real memory. The story was adapted into the 1990 film Total Recall with Arnold Schwarzenegger as the story's protagonist; that film was remade in 2012 with Colin Farrell as the protagonist.