Some of you may remember the PS2 game "Chaos Wars" developed by Idea Factory which featured several characters from the "Neverland" franchise, it also included characters from Aruze's "Shadow Hearts," Atlus' "Growlanser" & RED Entertainment's "Gungrave" and "Shinsengumi Gunrou Den" (known as "Code of the Samurai" in Europe.) The game is typically most well remembered for it's "great" voice acting.

In Chaos Wars the guest characters use themes that are arrangements of songs from their original games, primarily the opening themes of said games. Recently I've been trying to compile a list of what theme was an arrangement of what and currently the only ones I'm uncertain about are the themes used by characters from Spectral Souls, Spectral Souls 2, Generation of Chaos 3: The Seal of Time, Steady x Study & Gungrave. With the exception of Gungrave all of these are from the Neverland series of games, though from what I understand Study x Study is only vaguely connected because of one particular character. Anyway, I figured there might be a few people out there that are more familiar with these games and their music than I since many of the Neverland games were never released in the west.

I don't want to make a massive text dump so I'll provide a link to my GameFAQs post listing the confirmed and unconfirmed tracks as well as a link to a gamerip of the Chaos Wars music files since there was never an official soundtrack of any kind. https://gamefaqs.gamespot.com/boards/934027-chaos-wars/76502871