This game was THE SHIT back in the day. Mecha musume taken to the extreme, I'd call it Medabots meets Senran Kagura. Almost every part was interchangable, gameplay was sweet, missions were really nice, both solo and co-op and the versus was laggy but still pretty fun.
They made a new version of this game on steam but it's sadly not as played as before, but boy what I'd give to get back to the good old days when this game was peaking.