I suppose you could build a box dedicated just to steam with libre hardware.
I know the new intel HD 4600 graphics are really quite good for mainstream
gaming at modest resolutions. You could have libre graphics, libre wireless
and a libre OS. Which would make it an ethical step-up from a locked down
console.
But in no way am I endorsing Trisquel for such an application. It's just a
perplexing proposition that even rms seems rather more softer than usual
about the issue:
"However, if you're going to use these games, you're better off using them on
GNU/Linux rather than on Microsoft Windows. At least you avoid the harm to
your freedom that Windows would do.
Thus, in direct practical terms, this development can do both harm and good.
It might encourage GNU/Linux users to install these games, and it might
encourage users of the games to replace Windows with GNU/Linux. My guess is
that the direct good effect will be bigger than the direct harm. But there is
also an indirect effect: what does the use of these games teach people in our
community?"
https://www.gnu.org/philosophy/nonfree-games.html
