BioShock Infinite isn't just a worthy sequel to a much-loved predecessor. It also manages to be about America - touching on its past, present and possibilities — in a way that makes it a must.

You haven't been to a place like this before. The fictional floating city where Infinite is set is all clockwork platforms and brass gears, its many sections populated with hucksters, strivers, lovers and schoolchildren. One minute, you're walking past a sheer drop, the next a park swings down into the open space.