Collector interest
A true holy grail of the Japanese Xbox 360 library, this Cave-published title combines every factor of extreme scarcity: a strictly domestic 2010 release, a tiny installed base in Japan, a niche print run never reissued, and the highly sought Cave imprint. Sealed copies clear 1400 euros and complete sets stay prohibitive, ranking it among the costliest discs on the platform. Demand comes mainly from shooter collectors and Cave completists, who treat it as an end-of-collection benchmark.