According to Official Guinness Records,
The longest piece of original music scored for a videogame is 'prime # 4507', composed by Hideki Sakamoto (Japan) and lasting 1 hour 15 min 7 sec. It was created for echochrome ii (Sony Computer Entertainment, 2010) and released on 21 December 2010.
In contrast with traditional videogame soundtracks which use a level-by-level approach or mix multiple pre-recorded tracks into each other, prime #4507 is one continuous arrangement that plays throughout the game regardless of the player's progress. According to the claimants: "Normally, in the genre of video game music, music is prepared for each scene, stage or level. What we wanted to create was a piece of background music for a particular situation, i.e., while “playing with puzzles,” which would play continuously, just like how background music at formal events and parties is provided continuously." The mind-bending levels in echochrome (Game Yarouze, 2008) and its 2010 sequel were inspired by the “impossible” architectural designs of Swedish artist Oscar Reutersvärd, known as “the father of impossible figures”. He is credited for creating the Penrose Triangle, an image of a “3D” triangle that can be drawn, but not built, and was a major inspiration for Dutch abstract artist M C Escher.
For a complete list of 2010 records, please visit 2010 Guinness Records in Japan.