Not counting LE/Prototypes there's 5 versions of the game out there as far as I know: Japanese US 1.0 (the one with the static title) Europe SA International US 1.1 (the one with the animated title) They were released J > U > E > Int, but the dates in their copies of ip.bin are pretty interesting: J - 12 December 1998 U1.0 - 12 August 1999 E - 9 September 1999 Int. - 20 September 1999 U1.1 - 5 October 1999 The majority of revisional differences are between the 1998 Japanese copies and the initial US ones: Character Tweaks (Running blur removal, giving Gamma more voices, making the holding animations less weird looking etc) Many Camera Tweaks Object Tweaks Additional Menus (Emblem Results etc.) Fixing Bugs (Like letting the player move before the timer starts after titlecards in SA1 J) Additional Languages (and removing a lot of Japanese clips that weren't used) Idle Lines (and stuff like "Welcome to Twinkle Park") Different Wallpapers in Track 1 From what I know these are the differences I've found between the 1999 versions: U1.0 and Int. add the Japanese subtitle to the title screen if the language is set to Japanese. U1.1 and E have no effect. Despite still working, the hidden level select's options are blank in all versions of the game that use the animated title screen (E, Int, U1.1) Reebok DLC only works in E (Vice versa for AT&T - works in any version except E) I put most of the stuff on TCRF a while ago if you want to see what specifically was changed: https://tcrf.net/Sonic_Adventure_(Dreamcast)/Version_Differences Don't know about the music thing though. Nights_A and Nights_S are in all versions of the game as far as I know.