Bioshock Infinite was probably the most confusing game I have ever played because when playing it you are constantly moving between both different times and different universes.  I could see why some people may be attracted to this type of game but for me it was just too complicated.  To me the most important time and place was when Dewitt/Comstock either decided to either accept the baptism or not.  This is significant because it resembles both the start and end of the plot.  The plot starts there because the version of Comstock is formed because he is the version that decided to find a way and forgive himself.  The version of Dewitt is formed because of him deciding that the baptism did not matter and he would go on to feeling shame.  This is also sort of the end of the plot because all of the Elizabeths from different timelines come back and kill Comstock at the baptism.  This is why the game seems like a paradox because while we see all of these things happen like bouncing around from different dimensions there is only one reality that we actually experience.