-Adds Galatia led by Brennus.
-Adds Brennus as a leader of Gaul.

-Brennus Trait/Diadochi Twilight: Units gain +5 Combat Strength or Religious Strength against enemies in a Golden Age or Dark Age. Units that defeat an enemy while fighting on a Hill gain Gold and Faith equal to 50% of the enemy unit's Combat Strength.
-Brennus Agenda/Gallic Warband: Likes to pillage. Likes civilizations that pillage. Dislikes civilizations that do not pillage.

-Galatia Trait/Anatolian Highlanders: Units ignore Movement penalties from Hills in home territory. Cities gain standard Gold adjacency from Hills and standard Faith adjacency from Mountains.
-Galatia Unit/Galatai: Replaces the Scout. +10 Combat Strength against Anti-Cavalry class units. +17 Combat Strength with the Machinery technology.
-Galatia District/Drunemeton: Replaces the Holy Site. Always costs 50 Production to produce. +1 Appeal and +2 Housing. Tiles in the city that are at least Charming Appeal gain +1 Faith, additional +1 Gold and Faith if a tile has Breathtaking Appeal. +1 Gold and +2 Faith. Both Gold and Faith adjacency decrease by -1 from adjacent districts. Cannot be built adjacent to the city center.

-Galatia uses broken Greek and Latin names (cities, geographic landmarks, citizens).

-TSL support for Firaxis Standard Earth, YnAMP: Giant Earth, YnAMP: Greatest Earth, YnAMP: Large Europe, and YnAMP: Play Europe Again.

-Historic information can be found on Wikipedia.