: The specific identifier for the individual game or piece of software.
This suggests the string is a from a ROM dump tool, MAME dat file, or a Chinese game-sharing site – marking this specific build as exported from a Japanese source (possibly a dumped arcade board or a dev cart). : The specific identifier for the individual game
This :
(血兄弟) refers to a bond stronger than family, sealed through shared hardship, mutual saving of lives, or ritual (e.g., mixing blood with wine). In Japanese media, this parallels kyōdai (兄弟) or sakazuki-goto (杯事) — the yakuza sake cup ritual. MAME dat file