Scroll to the bottom of the game's page. Look for links usually hosted on Archive.org or other third-party servers.
Since Windows does not natively open .rar files, you will need a third-party tool: Download oldgamesdownload com Red Alert rar
Downloading classic games like (1996) or its sequel Red Alert 2 (2000) from OldGamesDownload.com is a common way to enjoy "abandonware"—software no longer officially supported or sold by the original developers. Step 1: Download the .rar File Scroll to the bottom of the game's page