No, technically it’s true. To play Windows Games through Steam on Linux you need to enable SteamPlay for most titles.

Afaik SteamPlay is enabled by default for certain games certified by Valve.

As long as you purchase the game (or more specifically the license) from the same Steam account, it will be available regardless of the operating system.

Sounds like a Nest Frame is preparing for release to me

I guess some people would suggest the GNU gnu?
On a more serious note: The mapped application/action would make sense.