O O Oasis of the ZombiesOblivionOblivion 2: BacklashThe Oblong BoxOctamanOctopusOctopus 2: River of FearOculusOf Unknown OriginOfferingsOldThe Old Dark House (1932)The Old Dark House (1963)Oldboy (2003)Oldboy (2013)The Omega ManThe Omen (1976)Damien: Omen IIOmen III: The Final ConflictOmen IV: The AwakeningThe Omen (2006)Once BittenOnce Upon a Time at Christmas1BROne Cut of the DeadOne Dark NightOne Hell of a Christmas100 TearsOne Million AC/DCOnibabaOpen HouseOpen WaterOpen Water 2: AdriftOpen Water 3: Cage DiveOpen Your EyesOperaThe OracleOrcaOrphanThe OrphanOrphan: First KillThe OrphanageThe OtherThe Other HellThe Other SideThe OthersOtisOuijaOuija: Origin of EvilOur HouseOut of the BodyThe OutingOutpostOutpost: Black SunOutpost: Rise of the SpetsnazOverlord