Battle at the Big Bridge

"Clash on the Big Bridge" is the official name of Gilgamesh's theme from Final Fantasy V. Known in the Final Fantasy V: Original Sound Version as ビッグブリッヂの死闘 (Biggu Burijji no Shitō), lit. "Battle to the Death on the Big Bridge".

It was first played in the game during the party's trek across the Big Bridge from Exdeath's Castle, when they were forced to face the swordsman. Composed by Nobuo Uematsu in 1992, it had since been a fan favorite and was remade into different versions.

Piano Collections: Final Fantasy V
The track was included in the Piano Collections album of Final Fantasy V where it is titled "Battle with Gilgamesh". The track was rearranged on piano by Shirou Satou and performed by Toshiyuki Mori.

The Black Mages
The theme is best known for the cover the Black Mages' included in their first, eponymous album The Black Mages, entitled "Clash on the Big Bridge".

Final Fantasy XII: Original Soundtrack
Due to Gilgamesh's appearance in Final Fantasy XII, another version titled "Clash on the Big Bridge ~FFXII Version~" was included in the game's soundtrack, composed by Hitoshi Sakimoto.

Chocobo's Mysterious Dungeon ~Labyrinth of Forgotten Time~ Original Soundtrack
The prominence of this battle track continues with its use as the final battle theme for Final Fantasy Fables: Chocobo's Dungeon titled "Raffaello Battle", rearranged by Yuzo Takahashi.