O

Oasis of the Zombies (1982) by Johnny Sweatpants
The Oblong Box (1969) by TrevorOf Unknown Origin (1983) by 50 Page McGee
Occulus (2013) by Abduscias
The Old Dark House (1932) by JPX, Catfreeek, Octopunk
Old Hag (2007) by Catfreeek
Oldboy (2003) by Catfreeek, Octopunk
The Omega Man (1975) by Landshark
The Omen (1976) by Johnny Sweatpants, Julie, Jordan, Abduscias, AC
Omen (Sung Horn) 2003 by Catfreeek
Omen II: Damien (1978) by Johnny Sweatpants, Abduscias
Omen III: The Final Conflict (1981) by Johnny Sweatpants, Abduscias
Omen IV: The Awakening (1991) by Johnny Sweatpants, Abduscias
Omen 666 (2006) by Johnny Sweatpants, Octopunk, Julie, 50 Page McGee
On Sabbath Hill (2010) by Trevor
One False Move (1992) by Catfreeek
One Missed Call (2004) by DCD
One Missed Call 2 (2005) by JPX
One Missed Call 3 (2006) by JPX
Onibaba (1964) by Catfreeek, Whirlygirl
Only Lovers Left Behind (2013) by Catfreeek
Open House (2010) by Catfreeek
Opera (1987) by Whirlygirl, Johnny Sweatpants
Orphan (2009) by JPX
The Orphanage (2007) by JPX, Whirlygirl, Landshark, Catfreeek, DCD, Octopunk, Crystal Math
The Other (1972) by Catfreeek
The Other Side of the Door (2015) by JPX
The Others (2001) by Abduscias
Otoshiana (Pitfall) (1962) by Catfreeek
Ouija: Origins of Evil (2016) by Trevor