Eurogamer reports that 2K Games has revealed plans for Civilization IV: Beyond the Sword, a new expansion for the turn-based strategy game, though they incorrectly list the title as Beyond the Stars, which 2K clarified for us. No release date is revealed at this time, but they do have word on its content:

There will be 10 fresh civilisations, such as The Netherlands, Portugal and Babylon, each with their own unique style and leaders. Plus we can expect trowels-full of new units, leaders, and buildings to expand on the original game.

New corporations will be introduced, which will spread throughout the land and provide benefits for certain provisions. And you'll now have to watch out for random events, like natural disasters, pleas for help, or demands from your population.

Those of you seeking a diplomatic victory will now be able to do so earlier, choosing from more resolutions and diplomatic options, and more ways to spy on your opponents will be included much earlier on in the game.

The AI has been thoroughly worked over, as have the latter stages of the campaigns, with Firaxis intent on giving you more options as you reach the end of your technology tree. Because of this, the developer will include an advanced start option, which will let you begin playing further down the evolutionary line, allowing you to see the new bits and bobs without pouring your summer into the game.

This new expansion will also integrate community content, adding 12 new scenarios created or inspired by you, the fans.