Files with this naming convention are usually found on third-party file-sharing sites or torrent trackers rather than official platforms like Steam or the Microsoft Store.
: This indicates it is the second volume of a "split" archive. Multi-part RAR files are used to break down large game installers (often 30GB+) into smaller, more manageable chunks for uploading and downloading. Context and Risks sc23847-AOEIIIDEv1329985.part02.rar
If you are looking to play the game safely and with full features (including the latest expansions like Knights of the Mediterranean or United States Civilization ), it is best to use official channels. The game is frequently discounted on and is included in the Xbox Game Pass subscription. Files with this naming convention are usually found