i just don't see how this can be done. i have tried. if i can do this and beat arcade on insane, i will pretty much have seriously 3.0. it will just be a matter of time getting the rest of the onyx medals. i know i can get arcade on insane. beast mode on insane without failing is the only thing hindering me on this. is there a way people are doing this on insane without failing? if so, what are they doing exactly?