Unforgotten

200px|right Unforgotten is a song included in the Halo 2 Original Soundtrack. Its length is 2:09 miniutes. The first section of the song is included as one of the subsequent pieces in the main menu of Halo 2. The remake of this piece, Never Forget, is heard exclusively on the Halo 3 Original Soundtrack, as Unforgotten is played in the main menu of Halo 3, contrary to popular belief that the song is Never Forget. It is the only piece to be played on the main menu of two games (with the exception of the Gregorian Chant).

The song (or its very similar-sounding Halo 3 remake, Never Forget) was played during one of the many swimming events in the 2008 Beijing Olympics.