Released: JP September 27, 2012
Genre: Action role-playing game
Mode: Single-player
Developer: Nihon Falcom Corporation
Wiki: http://en.wikipedia.org/wiki/Ys:_Foliage_Ocean_in_Celceta
Platforms: psvita 

Released: Windows JP July 4, 2005 NA Steam March 19, 2012 EU Steam March 19, 2012 PlayStation Portable JP April 22, 2010 NA November 2, 2010 EU PSN January 27, 2011
Genre: Action role-playing game
Mode: Single player
Developer: Nihon Falcom Corporation
Wiki: http://en.wikipedia.org/wiki/Ys:_The_Oath_in_Felghana
Platforms: win 

Released: JP June 9, 2011 NA March 13, 2012 EU March 16, 2012
Genre: Action-adventure
Mode: Single-player
Developer: Sega
Wiki: http://en.wikipedia.org/wiki/Yakuza:_Dead_Souls
Platforms: ps3 

Released: JP March 18, 2010 NA March 15, 2011 EU March 18, 2011
Genre: Action-adventure
Mode: Single-player
Developer: CS1 Team
Wiki: http://en.wikipedia.org/wiki/Yakuza_4
Platforms: ps3 

Released:
Genre:
Mode:
Developer:
Wiki: http://en.wikipedia.org/wiki/Ys_I_%26_II_Chronicles
Platforms: psp 

Released:
Genre:
Mode:
Developer:
Wiki: http://en.wikipedia.org/wiki/You_Don%27t_Know_Jack_(2011_video_game)
Platforms: x360  wii  win  nds  ps3 

Released: JP February 26, 2009 NA March 9, 2010 EU March 12, 2010
Genre: Action-adventure
Mode: Single-player, Two-player (through minigames update)
Developer: CS1 Team
Wiki: http://en.wikipedia.org/wiki/Yakuza_3
Platforms: ps3 

Released: PC-8801 June 21, 1987 X1 June 26, 1987 PC-9801 August 28, 1987 FM-7/77 October 8, 1987 FM-77AV October 8, 1987 MSX2 December 10, 1987 Family Computer August 26, 1988 Sega Mark III October 15, 1988 Sega Master System 1988 ? IBM-PC/AT(MS-DOS) ? X68000 July 19, 1991 Nintendo DS February 10, 2008[citation needed]
Genre: Action role-playing game
Mode: Single player
Developer: Falcom (PC-88/PC-98/X1/FM-7/MSX2/Windows) Advance Communication (FC) Sega (SMS) Denpa Shinbunsha (X68000) Broderbund (Apple IIGS) KYODAI(IBM-PC/AT(MS-DOS)) Alfa System (TGCD) Team Digi (PS2) Dreams (NDS)
Wiki: http://en.wikipedia.org/wiki/Ys_I:_Ancient_Ys_Vanished
Platforms: nds 

Released: June 24, 1988
Genre: Action role-playing game
Mode: Single player
Developer: Nihon Falcom Corporation Advance Communication (FC) Alfa System (TGCD) Team Digi (PS2) Dreams (NDS)
Wiki: http://en.wikipedia.org/wiki/Ys_II:_Ancient_Ys_Vanished_-_The_Final_Chapter
Platforms: nds 

Released: JP March 6, 2008 December 11, 2008 (TheBest)
Genre: Action-adventure
Mode: Single-player
Developer: Amusement Vision
Wiki: http://en.wikipedia.org/wiki/Yakuza:_Kenzan!
Platforms: ps3