User blog comment:Metroidzard/Infinite Multiplayer Rumours/@comment-5154803-20120813050129/@comment-867628-20120813144303

I'm not sure if split-screen co-op would work in single-player mode, though; that would kinda defeat the purpose of connecting with your companion, Elizabeth (if she were also being controlled by a player), not to mention that they've stated that she can't use those powers of hers all the time or has trouble controlling them. That would be problematic for co-op/storyline purposes. I say just keep the long, memorable story with multiple choice endings.