PC; Inkle The UK game developer’s latest is a database mystery constructed from an archive of fictional books. Their combined contents threaten to crack the code of reality PC; Inkle The UK game developer’s latest is a database mystery constructed from an archive of fictional books. Their combined contents threaten to crack the code of reality B letchley Park: famed home of the Enigma machine, Colossus computer, and, according to the premise of TR-49, an altogether stranger piece of tech.