Green Hill Zone is the first level of Sonic the Hedgehog, released for the Sega Genesis in 1991, and its theme was composed by Masato Nakamura of the band Dreams Come True. The melody became inseparable from the Sonic brand, returning in dozens of later games, concerts and remixes. Because it opens the game, it is the tune most fans heard first and associate with SEGA's golden era. Today it scores nostalgia edits, speedrunning content and memes that borrow its pure 16-bit optimism.