Left 4 Dead 3 is aimed for an early 2017 release, according to rumors. There are no official statements on the release yet at this time.
Disneyland - 1954 Adventures in Fantasy 4-8 was released on: USA: 6 November 1957
Moving Pictures Live - 2009 Fantasy 2-4 was released on: USA: April 2010
They (Valve and Havok) haven't announced a left 4 Dead 4, but they have announced a Left 4 Dead 3 coming out in 2011.
Fantasy Factory - 2009 Welcome Big Black 4-1 was released on: USA: 4 April 2011
Fantasy Factory - 2009 The Bleeding Frogs 4-3 was released on: USA: 18 April 2011
Fantasy Factory - 2009 Phoenix of Love 4-10 was released on: USA: 20 September 2011
Fantasy Island - 1977 The Heroine The Warrior 4-12 was released on: USA: 24 January 1981
Fantasy Factory - 2009 Ginger Lion 4-6 was released on: USA: 9 May 2011
Vaginal Fantasy - 2012 The Iron Duke 1-4 was released on: USA: 30 April 2012
Fantasy Island - 1998 Dying to Dance 1-4 was released on: USA: 17 October 1998
PC: Left 4 Dead Xbox: Halo 3 PS3: Final Fantasy XIII Those are just my opinions but out of all of them Left 4 Dead