A great way to add fresh content to the game is through additional civilizations. Please see this topic on the CFC Forums for how to play a game with mods. This one’s more of a pack than just a single mod, but that only means one thing: you’re free to choose which features you want to include. civ5mod file into a sub-directory of the same name

civ5mod file into your Civ V mods sub-directory (usually 'C:\Users\\Documents\My Games\Sid Meier's Civilization 5\Mods') civ5mod file somewhere safe (if your browser displays a page of gibberish, right-click the icon and select 'Save target as. Select the mod you wish to use from the category list on the left.Looking for my The Sims 2 mods? They're here! WHoward's Pick'N'Mix Mods for Civilization V