A well-known problem of game development, characterised by professional experts as 'The Sequential Success Conundrum', can be summed up thus: how much do you make your sequel like your previous, successful game? And how much do you change it in the name of progress? Difficult decisions must be made in long, sweaty meetings. For the developers of this sequel to Battlefield 1942 the answer was something along the lines of: "It has to be exactly the same, only different too, please." To their ...