Mega Man Battle Network Series OSTs Are Now Online on Spotify Mega Man Battle Network‘s 20th anniversary. [Thanks, 4Gamer!] The Mega Man Battle Network OST consists of 281 tracks from the series seven Game Boy Advance titles. In addition to all six mainline games, the OST also includes music from Mega Man Battle Network 4.5: Real Operation, the spinoff exclusively released in Japan where the players themselves become NetOperators and directly interact with NetNavis like MegaMan.EXE and Roll.EXE. The Battle Network series primarily consisted of six mainline 2D action RPGs on Game Boy Advance. The titles have an interconnected story that tells the tale of Lan Hikari and his NetNavi MegaMan.EXE throughout all six years in grade school.