It is rather difficult to put the games associated with the Megami Tensei franchise in a list. The following list is largely based on the Wikipedia Megami Tensei franchise page. The date mentioned after each title is the date of the Japanese release.
Megami Tensei
- Digital Devil Story: Megami Tensei (11 September 1987)
- Digital Devil Story: Megami Tensei II (6 April 1990)
- Kyuuyaku Megami Tensei (31 March 1995)
Shin Megami Tensei
- Shin Megami Tensei (30 October 1992)
- Shin Megami Tensei II (18 March 1994)
- Shin Megami Tensei if… (28 October 1994)
- Shin Megami Tensei III: Nocturne (20 February 2003)
- Shin Megami Tensei: Strange Journey (8 October 2009)
- Shin Megami Tensei IV (23 May 2013)
Devil Summoner/Raidou Kuzunoha
- Shin Megami Tensei: Devil Summoner (25 December 1995)
- Devil Summoner: Soul Hackers (13 November 1997)
- Shin Megami Tensei: Devil Summoner: Raidou Kuzunoha vs. The Soulless Army (2 March 2006)
- Shin Megami Tensei: Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon (23 October 2008)
Persona
- Revelations: Persona (20 September 1996)
- Persona 2: Innocent Sin (24 June 1999)
- Persona 2: Eternal Punishment (29 June 2000)
- Shin Megami Tensei: Persona 3 (13 July 2006)
- Shin Megami Tensei: Persona 4 (10 July 2008)
- Persona 4 Arena (1 March 2012)
- Persona 4 Arena Ultimax (28 November 2013)
- Persona Q: Shadow of the Labyrinth (5 June 2014)
- Persona 4: Dancing All Night (late 2014)
- Persona 5 (late 2014)
Digital Devil Saga
- Shin Megami Tensei: Digital Devil Saga (15 July 2004)
- Shin Megami Tensei: Digital Devil Saga 2 (27 January 2005)
Devil Survivor
- Shin Megami Tensei: Devil Survivor (15 January 2009)
- Shin Megami Tensei: Devil Survivor 2 (28 July 2011)
Devil Children/DemiKids
- Devil Children: Red Book/Black Book (17 November 2000)
- Devil Children: White Book (27 July 2001)
- Devil Children: Card Summoner (27 July 2001)
- DemiKids: Light Version/Dark Version (15 November 2002)
- Devil Children: Puzzle de Call! (25 July 2003)
- Devil Children: Book of FIre/Book of Ice (12 September 2003)
- Devil Children: Messiah Rider (4 November 2004)
Last Bible
- Revelations: The Demon Slayer (23 December 1992)
- Megami Tensei Gaiden: Last Bible II (19 November 1993)
- Another BIble (3 March 1995)
- Last Bible III (4 March 1995)
- Last Bible Special (24 March 1995)
Majin Tensei
- Majin Tensei (28 January 1994)
- Majin Tensei II: Spiral Nemesis (19 February 1995)
- Ronde (30 October 1997)
- Majin Tensei: Blind Thinker (11 July 2007)
Stand-alones
- Jack Bros. (29 September 1995)
- Giten Megami Tensei: Tokyo Mokushiroku (22 January 1999)
- Shin Megami Tensei: NINE (5 December 2002)
- Shin Megami Tensei Pinball: Judgment (12 July 2006)
- Aegis: The First Mission (14 November 2007)
- Shin Megami Tensei Online: Imagine (30 March 2007)