Daisy Fitzroy’s death
DeWitt and Elizabeth find out that Daisy Fitzroy, the leader of the resistance group Vox Populi, isn’t who they thought she’d be. She murders the villainous Jeremiah Fink — owner of Fink Manufacturing, a powerful company in Columbia that, among other things, produces and sells the Plasmid-like Vigors. He almost kills his son were it not for Elizabeth literally stabbing her in the back with a pair of scissors. It’s a crucial turning point for Elizabeth, and not just because of the new clothes and haircut she gives herself after the incident. Like DeWitt, the blood is now on her hands, too, and it’s something she won’t forget.
‘Constants and variables’
For better or worse, BioShock Infinite overwhelms the player with one revelation after another in the last 15 minutes. Not only do you return to Rapture to kill Songbird, Elizabeth’s obedient but deadly guardian, but you find out that you’re in just one of the infinite number of worlds (or “doors,” as Elizabeth says) within the BioShock multiverse. Some have minor adjustments compared to the timeline we played — like which brooch we picked for Elizabeth earlier in the game — but others are more dramatic, like having an entire city exist underwater instead of floating in the air.
During this mind-bending journey, DeWitt realizes that he actually gave up his only child, Anna, to “wipe” away his gambling debts. The child ends up in Comstock’s hands via a transdimensional tear and grows up to become Elizabeth. When DeWitt travels to Columbia 20 years later through another tear created by the god-like Lutece Twins, he makes up new memories that conveniently hide the existence of Anna and Comstock. Then we find out the true origin of Comstock: He’s actually Booker DeWitt. In other worlds, DeWitt copes with his sins from the Battle of Wounded Knee by finding religion, and he adopts a new identity as Zachary Comstock after being baptized in a river.
Elizabeth and her father agree that the only way to get rid of Comstock’s presence throughout the multiverse is to kill DeWitt right before he accepts his baptism.
Chasing down Comstock in Rapture
Burial at Sea: Episode One uses Rapture to set up a familiar context — you’re back playing as DeWitt, and you have to rescue a girl named Sally from the clutches of evil. But here, Elizabeth plays a dramatically different role. The naiveté we saw in the original game is gone, and throughout this chapter, you get the sense that she knows way more about the situation than she’s letting on.
She reveals her true intentions right at the end, where pulling Sally — who had already turned into a Little Sister — from the vent causes DeWitt to remember who he really was: another version of Comstock. Except in this universe, Comstock panicked when he tried to steal baby Anna from a different DeWitt in the past, accidentally lopping off the child’s head when he demanded that the Lutece twins shut down their tear-opening machine. Consumed by guilt, Comstock escapes into Rapture, where his old memories disappeared when he tried to build a new life for himself.
In an act of revenge, modern-day Elizabeth used Sally’s disappearance to deliberately lead DeWitt to this point, where she knew he would remember his crimes. She watches silently as a Big Daddy brutally kills him.