on a ps4.. ? not sure really, since there is jailbreaks for it, i do remember years ago when black ops1 was still being played, I managed to Campaign/USB softmod the game, would only work while running the game but then i was able to use mods, eventually i was caught by treyarch, maybe from them watching my gameplay or w.e, permanently banned me from that game for life?? even today if i try to boot it up, before the game title launches into the intro video i get a message saying im disconnected, only on blackops 1 though, so to sum it up, its about 50/50 on it being legit