Burial at Sea (Bioshock Infinite DLC)

The Audio Log in the one of the clothes shops at the start of the DLC has Yi Suchong mentioning that somebody got wind of his experimentation into Plasmids and tried to steal his thunder, and thus he developed a way to make Plasmids be digestible in the stomach, hence Vigours.

[COLOR="#cc8899"]Theft of intellectual property two way street. Suchong is awesome.

 Spoiler

I have yet to progress with the plot because THIS MOTHERpineappleER still creeps me out from the first game:

[/COLOR]