If this is a mod, the files typically need to be moved to the game's data folder , usually located at: C:\Program Files (x86)\Steam\steamapps\common\Napoleon Total War\data
If you don't already own the base game, you can find the Definitive Edition on Steam or Feral Interactive for mobile versions.
A standalone mod that shifts the era to the 16th and 17th centuries.
Improves AI, battle physics, and increases unit sizes for more epic scale combat.
To access the contents of a .rar file, you need a software utility like WinRAR or 7-Zip .