Practically, the viral PDF has revolutionized the "backend" of running the game. Call of Cthulhu is a game heavy on administration—handouts, maps, character sheets, and dense reference tables. The PDF format offers a utility that a physical book cannot match for the modern Keeper.
The Keeper uses a simulated audience chat to influence the group, offering "super chat" donations or accusing the events of being fake to provoke risky behavior. Call Of Cthulhu Viral Pdf
