Stardeus, a colony sim published by Paradox Arc with Factorio style design and an aesthetic that calls to mind FTL, is free to try on Steam.

If you're looking for something a little less complex than Civilization, the Epic Games Store's free game of the week has you covered.

You can run advanced, Microsoft-supplied tools like SFC, DISM, and CHKDSK every now and then to keep things smooth. If you want to run all those tools in one spot, there’s a cool free program called ...