A long-standing repository for retro PC titles. They often host the files, though they may require a small fee for high-speed downloads or offer a slow free version.
For the most authentic (and functional) experience, some enthusiasts run these older games using VirtualBox with a Windows XP installation. Important Safety Warning nickelodeon-jigsaw-pc-game-free-download-full-version
A reputable site for downloading games that are no longer supported by their original publishers. Technical Tips for Modern PCs A long-standing repository for retro PC titles