Music can be an incredibly important part of a video game, and a new feature over at 1up looks at some of the best uses of diegetic music — that is, music that's actually a part of the game world. From the haunting sounds of "Beyond the Sea" while you explore the underwater city of Rapture in Bioshock to the ever-present radio stations of the Grand Theft Auto games to the famous opera scene from Final Fantasy VI, there are plenty of solid choices. The piece is a great way to reminisce about those gaming moments where the music is arguably the most important part, and if you're looking for even more game music reading, be sure to check out 1up's entire week-long series on the topic.