The Phantasy Star series first game was Phantasy Star released on 20th December 1987.
1987
Phantasy Star
20th December 1987
1989
Phantasy Star II
21st March 1989
1990
Phantasy Star III: Generations of Doom
21st April 1990
1992
Phantasy Star Adventure
13th March 1992
Phantasy Star Gaiden
16th October 1992
1993
Phantasy Star IV: The End of the Millennium
17th December 1993
1994
2nd April 1994
2000
Phantasy Star Online
21st December 2000
2001
Phantasy Star Online Ver. 2
7th June 2001
2002
Phantasy Star Online Episode I & II
12th September 2002
2003
16th January 2003
Phantasy Star Online Episode I & II Plus
27th November 2003
Phantasy Star Online Episode III: C.A.R.D. Revolution
2005
Sega Ages 2500 Series Vol. 17: Phantasy Star Generation: 2
24th March 2005
2006
Phantasy Star Universe
31st August 2006
24th October 2006
2008
29th January 2008
18th April 2008
24th June 2008
Phantasy Star Portable
31st July 2008
2009
Phantasy Star 0
12th February 2009
21st April 2009
Phantasy Star Portable 2
3rd December 2009
2013
Phantasy Star Online 2
28th February 2013
2014
27th November 2014
2016
20th April 2016
2018
Phantasy Star Online 2: Cloud
4th April 2018
SEGA AGES Phantasy Star
31st October 2018
13th December 2018
2021
Phantasy Star Online 2 NEW GENESIS
31st December 2021