Fortified Zone, known in Japan as Ikari no Y?sai (?????, Ikari no Y?sai, "The Fortress of Fury") is a 1991 video game developed and published by Jaleco for the Game Boy. It was first released in Japan on February 26, 1991 and later released in North America in September 1991. It was later added to the Nintendo 3DS's Virtual Console on July 7, 2011, but the Australia region had it added on July 28, 2011.