In this parallel narrative unfolding alongside R-Type Delta's events, players join the ranks of Cosmic Cop, a private security outfit combating a uniquely urban threat. The Bydo—the series' enigmatic antagonistic force—have corrupted autonomous vehicles into rogue weapons, transforming them into unpredictable killing machines dubbed "Mad Cars" that terrorize populated areas. As a Cosmic Cop operative, your mission involves tracking down and neutralizing these corrupted machines before they cause further devastation. The game explores how the alien menace extends beyond traditional warfare into everyday technology, turning familiar infrastructure into instruments of chaos that demand swift intervention.