Train your custom Madness combatant for the endless trials of Arena Mode, building weapons from your own sick imagination to get through just one more wave of MADNESS: Project Nexus is a third-person Run n' Gun-slash-Beat'Em Up filled with arcade-style action and button-mashing brutality. Summary: MADNESS: Project Nexus is a third-person Run n' Gun-slash-Beat'Em Up filled with arcade-style action and button-mashing brutality.