Big Sister will not be BioShock 2's central villain said Melissa Miller, a PR rep for 2K Marin during last week's hands-off preview session with the game. According to Miller the Big Sister is a gollum acting on behalf of a greater evil.
But who's surprised? Critics praised BioShock's final act plot twists. And judging from our brief look, the folks at 2K Marin intend to deliver exactly what players loved about its predecessor. Narrative curveballs included.