Windows 10 includes tools to help you use less drive space, one of which is a compression utility called Compact. Normally you would access this through the command line, however now there is an open-source graphical interface available called Compact GUI that makes the built-in utility much easier to use, and less daunting to inexperienced users.

I haven’t noticed any performance issue …if anything it feels a bit faster – and as for the results:  WOW

If you want to give it a go, you can find CompactGUI here https://github.com/ImminentFate/CompactGUI/releases

Note, in the CompactGUI wiki states that over time as the games update they will gradually decompress.  However you can run run compact.exe /c /s on the folder afterwards which will mark it so that future files will get compressed..   Not as tight as Xpress, but compressed none the less.

https://github.com/ImminentFate/CompactGUI/wiki/Important-Information

Check here, not all games compress as well as ARK:

https://github.com/ImminentFate/CompactGUI/wiki/Community-Compression-Results