The .rar extension indicates a compressed archive created with WinRAR. Because this is "part 1," you will typically need all subsequent parts (part 2, part 3, etc.) in the same folder to successfully extract the game.
It is highly recommended to scan any files downloaded from unofficial sources using a tool like VirusTotal before execution. Related Industry Insights download-gcp-dgone-games-compressedpc-com-part1-rar
The file download-gcp-dgone-games-compressedpc-com-part1-rar appears to be a multi-part archive file related to (often abbreviated as "DG") hosted on a Google Cloud Platform (GCP) server or a third-party site using GCP infrastructure. Summary of Risks and Technical Context official reports indicate:
Developers use Google Cloud for Gaming to manage global player demand and scale servers seamlessly. download-gcp-dgone-games-compressedpc-com-part1-rar
For context on how games use infrastructure like GCP, official reports indicate: