While video game genres are based upon their gameplay content, psychological horror as narrative is used in some video games. A few successful video game franchises have spawned from using psychological horror as a main form of creating fear, the most well known being Silent Hill. Other psychological horror games include Amnesia: The Dark Descent, Soma, Manhunt, Nocturne, Condemned: Criminal Origins, The Evil Within, Higurashi no naku koro ni, LSD, Alan Wake, Deadly Premonition, Eternal Darkness: Sanity's Requiem, Cry of Fear, Outlast, The Suffering, Anna, Lone Survivor, BioShock and to some extent, Dead Space , F.E.A.R, Spec Ops: The Line and The Swapper.