X Newgameplus. In Free Play Mode, go thru all stages, starting with Central Highway, then the 8 Maverick stages (in any order), then the 4 Sigma stages in order. Perhaps there could also be a similar category for Vile, but I have yet to play that mode so I don't know if it wold work very well.

but MHX have not NG+ mode; It would be kinda weird to do a run where u have to play the intro.. reset and then load a file to play stages where wont be bosses. let me check other opinions of that category first. but if you have any antecedent of this with another game pls give me a link.