The Classic NES Series: Metroid, released for the Game Boy Advance in 2004, is a portable version of the original 1986 Metroid game for the NES. This action-adventure game brings players back to the iconic role of bounty hunter Samus Aran as she navigates the alien planet Zebes. She must battle space pirates and investigate the parasitic Metroids. The game boasts exploration-heavy gameplay, a significant aspect of the Metroid series, encouraging players to explore, backtrack, and uncover new abilities to progress.