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

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

Other games:
Dissidia: Final...