Chronological Disgaea Game Release List

 Using only Japanese versions:

1. Disgaea: Hour of Darkness: January 30, 2003
2. Disgaea 2: Cursed Memories: February 23, 2006
3. Disgaea: Afternoon of Darkness: November 30, 2006 (rerelease)
4. Disgaea 3: Absence of Justice: January 31, 2008
5. Disgaea DS: June 26, 2008 (rerelease)
6. Disgaea 2: Dark Hero Days: March 26, 2009 (rerelease)
7. Disgaea 4: A Promise Unforgotten: February 24, 2011
8. Disgaea 3: Absence of Detention: December 17, 2011 (rerelease)
9. Disgaea D2: A Brighter Darkness: March 20, 2013
10. Disgaea 4: A Promise Revisited: January 24, 2014 (rerelease)
11. Disgaea 5: Alliance of Vengeance: March 26, 2015
12. Disgaea PC: February 24, 2016 (rerelease)
13. Disgaea 2 PC: January 30, 2017 (rerelease)
14. Disgaea 5 Complete (Switch): March 3, 2017 (rerelease)
15. Disgaea 1 Complete (PS4, Switch): July 26, 2018 (rerelease)
16. Disgaea 5 Complete (PC): October 22, 2018 (rerelease)
17. Disgaea 4 Complete+ (PS4, Switch): October 29, 2019 (rerelease)
18. Disgaea 4 Complete+ (PC): September 10, 2020 (rerelease)
19. Disgaea 6: Defiance of Destiny: January 28, 2021

Notes:

1. 2004, 2005, 2007, 2010, 2012 didn't have a Japanese Disgaea release.
2. Disgaea 3, D2 do not have PC releases yet.
3. Largest gap between main series is between Disgaea 6 and 5 (6 years). Shortest gaps are between Disgaea 2-Disgaea 3 and Disgaea 4-D2-Disgaea 5 (2 years for each gap).
4. On average, there is a new game in 2.5, or in rounded fashion, 3 years.