As part of their September patch for Civilization VI, Firaxis has just released a new battle royale game mode, a post-apocalyptic race to survive all other factions and leave the increasingly uninhabitable planet.
Update: The September patch is live; all Civilization VI owners can now play this multiplayer scenario.
The devs demonstrated the new scenario in a livestream, pitting various Firaxis employees against each other. They discussed the genesis of the Red Death mode, as well as the various other features of the September patch.