|This article is written from the Real Life point of view|
Heion1 (as named internally) is an ambient theme in Metroid Prime 3: Corruption. It plays on the G.F.S. Olympus before and after the invasion on Norion, when the ship is not on alert. The theme is more mundane and calm in comparison to most Metroid themes, while still being unsettling and suggesting an impending doom. The theme also plays in Eastern SkyTown, Elysia, on Norion a month after the invasion, and in Transit Station 0205 of Pirate Command on the Pirate Homeworld, when the Demolition Trooper escort mission is completed. It was composed by Kenji Yamamoto. It should be noted that in Japanese, "heion" means "peaceful". This is the first of two "Heion" themes, with the other being "Heion2".
The theme can be heard here.