The hours spent playing this masterpiece were the perfect encapsulation of why videogaming is such a favourite waste of time for so many of us. Thrilling, terrifying, moving, confusing, amusing, compelling, and very very dark. BioShock isn't simply the sign of gaming realising its true cinematic potential, but one where a game straddles so many entertainment art forms so expertly that it's the best demonstration yet how flexible this medium can be. It's no longer just another shooter wrapped up in a pretty game engine, but a story that exists and unfolds inside the most convincing and elaborate and artistic game world ever conceived.