You may have recently heard that a SimCity prototype for the NES was unearthed near the end of 2018. Although not 100% finished, the game (which was never released on the NES, but instead developed for the SNES) does have a full score composed by Soyo Oka, who also composed the SNES version.
Nearly entirely different from the SNES score (only sharing “Metropolis”), the ten-song soundtrack is great. Each track helps tell the story that you get to build (just like later SimCity releases), but is even more stripped-down and raw, due to the hardware limitations. It’s a fantastic precursor to what became a fantastic game series, and can be heard in its entirety below. Happy listening!