LOS ANGELES November 7, 2007 Sierra Entertainment, a division of Vivendi Games, announced the latest installments for the award-winning F.E.A.R. (First Encounter Assault Recon), are now available for the Xbox 360® video game and entertainment system from Microsoft and Windows PC. F.E.A.R. Files, the complete stand-alone expansion pack series exclusive for the Xbox 360 and F.E.A.R. Perseus Mandate, the second expansion pack to the award-winning PC title, are both currently available at major retailers nationwide.