Armored Core VI: Fires of Rubicon

In a future where humanity has developed an interstellar civilization. On the frontier planet of Rubicon 3, a substance called, "Coral" was discovered that could be used as both an energy source and a data conduit. Coral was hailed as the key to humanity's technological advancement, but instead it caused a cataclysmic event known as the "Fires of Ibis," which engulfed the planet and the surrounding star system in flames and left behind a lethal contaminant. All Coral in existence was thought to have been consumed by the disaster.

Fifty years later, however, signs of Coral are once again detected on Rubicon 3. Corporations flock to exploit the planet and control the Coral, heedless of the cost and harm to the inhabitants, and mercenaries follow to profit from the conflict.

Augmented human designated "C4-621" who is in servitude to an infamous handler named Walter, and fights as an Armored Core pilot on the promise of earning a new life by taking on mercenary jobs.

After illegally landing on Rubicon 3, C4-621 steals the license of a deceased mercenary and assumes their callsign: "Raven."