BioShock Infinite DLC's playable Elizabeth won't be Booker in a dress - GameSpot

Irrational Games level designer Amanda Jeffrey says playing as Elizabeth in BioShock Infinite: Burial at Sea won't be like playing Booker.
BioShock Infinite is a first person shooter where players assume the role of former Pinkerton agent Booker DeWitt who is sent to the flying city of Columbia on a rescue mission to save Elizabeth, who has been imprisoned since childhood.

In Bioshock Infinite, why didn't Booker and Elizabeth, after learning the truth about themselves, just said 'alright, shall we go to Paris now?' and just live normally in their own universe?

Store Still brilliant.

Elizabeth, BioShock Wiki

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News - April, 2013

In Bioshock Infinite, why didn't Booker and Elizabeth, after learning the truth about themselves, just said 'alright, shall we go to Paris now?' and just live normally in their own universe?