I have a problem with Borderlands 2 and Portal. If I run native version game crashes soon after launching. If I run Windows version with Proton game doeasn't launch at all. I tried solutions from ProtonDB but none of them worked. I'm new to Linux gaming so I'm not sure what to do.
I have Intel i9 11th generation CPU, Nvidia 1650 GPU and 16GB RAM.
Fix: I installed lib32-nvidia-utils. Now I can run native version of Portal and Windows version of Borderlands 2 with Proton 7.0-6 (haven't tried other versions of Proton).
Do you have MangoHud installed? Last week I couldn't run any proton game on my system until I uninstalled it/ removed the MANGOHUD=1 variable haven't had this problem before, but something broke. Proton and wine were stuck at launching, no error messages/ logs, etc. drove me nuts.