Released in March 1987.
Psycho Soldier was the first-ever video game featuring a vocal soundtrack. The Japanese lyrics for the Psycho Soldier theme is also used as the Psycho Soldier team's team music in KOF94 and 96, as well as Athena's theme music in KOF 97 and 02.
Psycho Soldier's Soundtrack was released as a bonus with the purchase of Nintendo Famicom's Athena. It also included a vocal version of the ending theme.
The main character, Athena, appears in The King of Fighters series. Kensu, wearing a different outfit, appears in The King of Fighters series as 'Sie Kensou'. Kensu, as he appears here in Psycho Soldier, appears as a striker character in "The King of Fighters 2000
" as ''Psycho Soldier Kensou''.