Xexyz

Xexyz (pronounced zeks'-zees/zeks'-iz), known in Japan as Kame no Ongaeshi - Urashima Densetsu (亀の恩返し〜ウラシマ伝説〜?), is a 1988 video game developed by Atlus and published by Hudson Soft for the Nintendo Entertainment System. It was first released in Japan on August 26, 1988 under the title, and saw a North American release sometime in March, 1990. The game was never released in Europe. The story takes place in post-apocalyptic year 2777 after the Earth was devastated by nuclear war and natural disasters, the island nation of Xexyz is now threatened by Alien robots.