1989 · Adventure · Visual Novel · MSX · FM Towns · Sharp X68000 · PC-8800 Series · PC-9800 Series
Zero is the fourth 4th Unit game. Only a few days have passed since the andoird assaults and the shocking encounter with Blon-Win's clone. The Unified Force gathers all its resources, preparing to engage the shady trade organization WWWF. However, a strange accident leads Blon-Win to assume that one of the Unified Force's members might be a traitor.