This fix works for Linux and for windows running on crossover it might work for other programs as well but I only gon the one.
This is the command again
STEAMDECK=1 %command%
0:00 start
0:50 close all steam tabs after updating game
1:00 run command input
2:35 steam opens
3:25 update drivers if needed
4:00 Dark & Darker opens
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