Hello y’all, I’m at my wits end. I got the GoG version of BG3 (cause DRM free yay!), but for the love of me I cannot get it to work. I’ve done so much googling and so many workarounds, I’ve installed .net, I’ve skipped the launcher, I’ve used the alternate .exe, I’ve tried proton experimental and 8 and hotfix, but nothing has got me even as far as a loading screen. I just get a flash of black then crashed back to desktop. If anyone has any insights or help I would greatly appreciate it, I’m using Heroic right now but honestly I’ll do whatever to get this thing working.
I don’t have an exact answer for you but I can 100% confirm it works through Heroic.
Switch to desktop, install heroic launcher, install BG3 with default options to internal SSD, launch with Proton Experimental, it will say you need .net so accept the dialogue and download the exe, use Heroic to install the .net exe to the game’s prefix, go to the configuration again and add --skip-launcher (two hyphens at the beginning) to the launch commands.
That’s it, I did that and ran the game from desktop and then used heroic to add it to Steam. Now I launch the game straight through Game Mode. I also added Heroic as a non-steam game so I can launch it occasionally for patches.
Skipping the launcher is important, as is installing the correct .net exe. I’ve read that some folks had the game claim to be installed but then realized it never actually completed successfully because they ran out of disk space during the final step. It’s a very large install. I also read a one-off comment that power tools can break it, if you have that installed through decky loader.