Main series:
Final Fantasy (12/18/1987)
Final Fantasy II (12/17/1988)
Final Fantasy III (4/27/1990)
Final Fantasy IV (7/19/1991)
Final Fantasy V (12/6/1992)
Final Fantasy VI (4/2/1994)
Final Fantasy VII (1/31/1997)
Final Fantasy VIII (2/11/1999)
Final Fantasy IX (7/7/2000)
Final Fantasy X (7/19/2001)
Final Fantasy XI (5/16/2002)
Final Fantasy XII (3/16/2006)
Final Fantasy XIII (12/17/2009)
Final Fantasy XIV (9/30/2010)

Sequel games:
Final Fantasy IV: The After Years (2/18/2008)
Final Fantasy X-2 (3/13/2003)
Final Fantasy XII: Revenant Wings (4/26/2007)
Final Fantasy XIII-2​ (2011)

Other games:
Dissidia: Final...