Metroid Dread is the best-selling game in the Metroid series, with over 2.9 million units sold since its release in October 2021. It surpassed the previous record holder, Metroid Prime, which sold 2.84 million units.
According to available data, the total sales for every Metroid game combined is around 22 million units3.
Super Smash Bros. played a significant role in maintaining Metroid's brand by consistently featuring Samus Aran as a playable character in every installment. This kept the character in front of gamers even when there weren't new Metroid games being released. The series also included Metroid-themed stages, music, items, and other cameos, further promoting the franchise.