Metroid series.The first Metroid game was released on Nintendo‘s Famicom Disk System in Japan before it made its way to the NES in North America and Europe later in 1987 and 1988 respectively.Taking inspiration from the 1979 sci-fi horror Alien – its main antagonist Ridley likely also named after the film’s director Ridley Scott – Metroid was a darker series compared to Super Mario and The Legend of Zelda, starring space bounty hunter Samus Aran as she sets out to the planet of Zebes to retrieve