I extracted these from their respective ISO files.
TMB:
Found unused mixes of certain battleground soundtracks (Freeway, Downtown/Highway Loop, Minion's Stadium, and Death Match 2), and was also surprised to find IN-GAME DIALOGUE! Most of the characters had their own unique voice clips for earning kills, low on health, and even their own death screams. I did notice some generic voice clips were included, which were to be used for everyone else (Billy Ray, John Doe, Charlie Kane, Cage, and Black) while Preacher, Stone, Grimm, No-Face, Bloody Mary, Dollface, Raven, Axel, Needles, and Marcus had clips voiced by their respective actors.
https://www.mediafire.com/file/cshgt72nglzsmat/unused_sounds.zip/fileTMHC:
These were pulled from the 8/11/2005 prototype, and I found music tracks that were from both the early builds of Harbor City and Head-On. Some tracks are completely unheard of by TM players, others are original unused mixes of Head-On tracks, and the rest are completed versions of Head-On tracks.
https://www.mediafire.com/file/0kzgimjxtjpumen/HC_Later_build.zip/fileEnjoy!