Great news, Portal with RTX is out now!
Per the Steam store page description:
Experience the critically acclaimed and award-winning Portal™ reimagined with ray tracing in this free DLC for Portal owners. Start thinking with portals, with RTX on.
I’d love to report how it runs…if I had a RTX GPU. I should have just kept the Thelio as an excuse to try it. If you don’t have a RTX GPU clicking “Play Game” won’t do anything.
But who knows, GamingOnLinux might have a report on it later today or later this week.