There have been four Scream movies released as of 2013.
Movies in Real Life - 2013 Lord of the Rings in Real Life 1-3 was released on: USA: 15 October 2013
The Evil Dead, Evil Dead (2013 remake of the 1981 film), Evil (movies of this name released in 2003 and 2005), the Resident Evil movies,
Joey Molland Liverpool to Memphis - 2013 was released on: USA: 21 April 2013 (Chicago International Movies and Music Festival)
There will be many, many thousands of movies playing in 2013. It would depend on the location and schedules.
The Screen Junkies Show - 2012 Most Underrated Horror Movies - 3.5 was released on: USA: 31 October 2013
Behind the Horror - 2013 was released on: USA: 13 October 2013
The Horror - 2013 was released on: USA: 14 September 2013 (Scarefest Weenie Roast)
Horror Haiku - 2013 was released on: USA: 6 February 2013 (Los Angeles, California)
Horror Filmed - 2013 was released on: USA: 30 October 2013 (Kansas City, Missouri)
RTN's Night of Horror - 2013 TV was released on: USA: 30 October 2013
The Horror Network Vol- 1 - 2013 was released on: USA: 11 October 2013
Some being released in mid-late 2013; The Human Centipede III Carrie Evil Dead Insidious; Chapter 2 Paranormal Activity 5
The Cure 48 Hour Horror - 2013 was released on: USA: 19 October 2013 (video premiere)
Horror Haiku - 2013 Rituals 2-4 was released on: USA: 22 May 2013
Horror Haiku - 2013 Curtain Number Three was released on: USA: 17 July 2013
Kevin12Mario Movies - 2013 was released on: USA: 25 December 2013