I’m all hyped for the new KOF XIV and I’m also planning on getting my own Neo Geo CD! So because of that, I did this (also because I don’t really have anything better to do).
This video has all the versions of the “Psycho Soldier” theme, at least that I know, if I missed one, please tell me.

Also, which version is your favourite? c;

Psycho Soldier – (1986) – Kaori Shimizu 0:00
Psycho Soldier – English – (1987) 1:09
Psycho Soldier – C64 – (1987) 2:19
Psycho Soldier – Cassette – (1987) – Kaori Shimizu 3:17
The King of Fighters ’94 – (1994) 6:23
The King of Fighters ’94 -Neo Geo CD- (1994) – Reiko Furui 8:46
The King of Fighters ’96 – (1996) 13:06
The King of Fighters ’96 -Neo Geo CD- (1996) – Tamao Sato 16:10
The King of Fighters ’97 – (1997) 19:32
The King of Fighters ’97 -Neo Geo CD- (1997) – Yukina Kurisu 22:34
SNK vs. Capcom – Match of the Millenium – (1999) 27:16
The King of Fighters 2002 – (2002) 29:37
KOF Sky Stage – (2010) 32:12

Everything showed in this video belongs to SNK.
I don’t own anything.