With Windows Vista, Microsoft introduced the Games folder which was a special location to manage your installed games. This folder also offers game updates, statistics, rating information, RSS feeds, and more. It acts like a central repository for all recognized games you have on your PC. This folder was available in all versions of Windows 10. However, it has been removed in Windows 10 Spring Creators Update, version 1803.
The development of Windows 10 Spring Creators Update, version 1803, is over. The final (RTM) build is 17133, which is already released to Fast and Slow Ring Insiders. Microsoft is actively working to push the OS to the production branch.
The removal of the Games folder wasn't mentioned in the official change log available for Insider Preview builds. That's because the folder wasn't visible anywhere in the user interface and could be accessed only with the shell command
shell:Games. You could use it to find your Windows Experience Index.
Note: When the Games folder is pinned to the taskbar or to the Start menu, it provides quick access to all installed games on your PC. It is also very useful when you have installed the good old Windows 7 Games in Windows 10:
Starting in Windows 10 version 1803, the Games folder has been removed from the OS. The shell command doesn't work any more.
It's obvious why Microsoft is not interested in supporting the classic Games folder in Windows 10. Its place has been already taken by the Xbox app. Most gamers prefer Steam over Microsoft's built-in solution.
Windows 10 Spring Creators Update, codenamed "Redstone 4", will bring a number of interesting features. These include Timeline, Cortana improvements, plenty of Fluent Design-powered apps and Settings pages, new security options, and more.
If you are interested in delaying the upgrade, refer to the article How To Delay Windows 10 Version 1803 Upgrade. This will allow you to pause the upgrade for up to 365 days and stay with your current Windows 10 version, if required.