Salt shakers at the ready, boys and girls - Resident Evil 6 may have a secret fourth campaign. A list of folder names allegedly extracted from the recent Xbox 360 demo has been posted on GameFAQs, revealing campaign menu options for returning femme fatale Ada Wong.
The possibly bogus list also points to an appearance by Resident Evil 5's Sheva Alomar, and suggests that Ada may get to use her famous hookshot - she'll appear in the Leon, Chris and Jake campaigns as an NPC. There's a regular landslide of potential info to be chewed over here. Good luck.