Flame of the Ancient World is an ambient music track composed by Mark Morgan for the Fallout soundtrack. The track is available as a part of the Vault Archives compilation.
This song also plays in the Fallout: A GURPS Post-Nuclear Adventure preview, and Many Contrasts in Fallout 2 has drum beats that sound similar, but faster.
Flame of the Ancient World appears in Fallout, it plays while the Vault Dweller is in the Los Angeles Vault.
It is re-used in Fallout: New Vegas, in various parts of the Mojave Wasteland, in Angel cave from Honest Hearts and in Lonesome Road, during the Courier's stay in the Hopeville missile silo bunker.