If you are looking for high-quality, safe game data, these established repositories are generally preferred over random rar downloads:

When searching for you are typically entering a niche corner of the digital archiving or specialized data community. PGN (Portable Game Notation) files are the standard format for recording chess games, and an "xPGN" variant often refers to extended datasets or compressed collections of millions of games used for engine training and deep database analysis. What is xPGN?

A large, high-quality, free database specifically curated for compatibility with software like SCID vs PC.

Offers millions of games in standard compressed formats.

If provided by the source, check the MD5 or SHA-256 hash to ensure the file hasn't been tampered with.

These files often contain massive libraries of Grandmaster games or engine-vs-engine matches (like those from TCEC or CCC).

Downloading compressed archives ( .rar , .zip , .7z ) from unofficial forums or obscure file-hosting sites carries inherent risks. Before extracting an xPGN archive, consider these safety steps:

Use a virtual machine or a "sandbox" environment to extract the files if the source is unverified.