Civilization 6 is set to add Australia to its turn-based 4X strategy bounds, which is the first time the land Down Under has featured in the series. Led by its 14th Prime Minister John Curtin, the Ozzies will enter the world domination fold as premium DLC alongside the game's forthcoming Australian Summer update.
Said to be "coming soon", the update itself will be free-of-charge and will see the introduction of both multiplayer teams and mod tools. "Steam Workshop will allow you to browse, add, and subscribe to mods more easily," reads this Steam community post, while other tools are set to make things easier for modders themselves. The addition of multiplayer will of course allow players to bundle up and conquer the world against AI or human opponents.
As for the Australian DLC, the new Civ will come packing a new unique ability, named Land Down Under, which provides cities extra housing when built on coastal tiles; a new unique unit, named The Digger, which replaces the infantry unit and offers additional power on land tiles adjacent to water; and a new unique improvement, the Outback Station, which unlocks with the guild civic and provides food and production—providing bonus food for adjacent pastures.
More on that is written here, and showcased here:
Civilization 6's Australian Summer update is "coming soon." You may wish to check out the Humble Civilization Bundle in the meantime.