

For me game is running. I have the newest update of Marvel Rivals Version 20250515. In the past it would not run with Proton Experimental and had to switch to Proton 10.0-1 (beta) (still do). Also had to add SteamDeck=1 %command%
, to make it run again. It runs right now as I write.
Sometimes after a system update I need to restart, otherwise games don’t launch. So maybe do system update now and restart entire PC and operating system, if you didn’t already.
The anonymous pipes are neat. I am building a project (need to go back to it) which runs an external application. I remember getting stdout and stderr was a bit complicated. These pipes could simplify things a lot.