The game's previous leak was huge, detailing settings and characters. But now Siliconera's uncovered more on protagonist Isaac Clarke's deteriorating mental state, confirming that the beleaguered engineer will now be haunted by a secondary personality.
The "Shadow Isaac" will hunt players throughout the game, perhaps similar to the way in which Clarke's dead girlfriend Nicole haunted him in Dead Space 2. What's unclear is whether Clarke is being affected by the Marker, or is simply going insane.
Interesting stuff, but we're getting a touch worried about these leaks. Hopefully EA can tighten up the flow before the whole plot is uploaded to the Internet.