The Underground Labyrinth
The Underground Labyrinth is played at the game's title and in the dungeons of Ultima: Exodus. It has a wonderfully hollow sound which sets the mood of the game right from the beginning and gives the dungeons a nice spooky feeling. The title is translated from the Ultima Mix album (地下迷宮-ダンジョン, Chikameikyuu - Dungeon).
Ultima: Exodus (NES)
The NES song is the original version of the tune. The song is track 1 in the NSF file and is played on the RP2A03.
Ultima: Fear of Exodus (MSX2)
The song was ported to the MSX PSG which gives it a flatter sound. It is track $0B in the KSS file.