Rule 34 Dev - 2boys alien arbiter armor bad_id bad_pixiv_id battle cityscape crossover dominic_santiago epic explosive full_body gears_of_war grenade gun halo_(game) halo_(series) highres marcus_fenix master_chief matsui0814 multiple_boys odst power_armor sangheili scenery science_fiction spartan spartan_(halo) train weapon|2868616998