This mod, the first of it's kind, fully implements the music of Rome: Total War into Rome II. It includes a variety of tracks for the campaign map, battle mode, the main menu, loading screens, and more. It will also play a cultural specific mix of songs when selecting a faction to begin a new campaign with.
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It is just amazing to hear RTW1 music in RTW2. makes the Experience so much better, amazing mod.
(Also, for those that dont know how to install it, just extract and paste it into your data folder, than download Rome 2 Mod Manager, and run it, find your file, and you are all set :) )