If you are looking for an actual "useful review" of the game itself to see if it's worth playing today:

Finding for the latest version of the game.

Explaining the between the launch version and the current "Anniversary" version.

Searching for a "review" of a file named Age of Empires IV v6.0.878.0.part5.rar suggests you are likely looking at a multi-part compressed archive, often found on third-party download sites or file-sharing platforms.

: Files ending in .partX.rar from unofficial sources are high-risk. They often contain malware, trojans, or miners bundled with the game data.