We are still thinking about it. Maybe something of their own will, as it will change the entire second half. For example in the train, where Gordon first appeared in the game will not only he and two residents of the City 17, but any more players. But to create location is difficult, and many of them, on this we can manage scenes. Example of such a plot. Gordon appears in the train, around paying attention to him ask "Where is he here?" And then a few players start to play and navigate through the locations of the limits of the first chapter. But those who started with Gordon. Canonicity we leave. Gordon gets in the torture of Barney, but what players will go on the train to Nova Prospekt, or go somewhere else, because there were doors to other locations which are not mentioned in the game, but because you can invent yourself? There are in fact those characters who were not on the train, such as Shepard or Alix. 1 may be in Nova Prospekt as a captive, well, and the second will begin in Kleiner's Lab.