Thanks to the work done before at https://github.com/Norbyte/bg3se/ I was able to use the Windows byte offsets to scrutinize/backtrack some code in Ghidra until I found similar areas (although quite different, see discussion here: Norbyte/bg3se#539) that were patchable.

Simply download the latest release from the Releases tab (built under an Ubuntu 18.04 docker, for maximal linux libc support):

https://github.com/ahungry/bg3-linux-ae/releases

and untar it anywhere you like (tar xzvf bg3-linux-ae.tar.gz) - you do not need to untar or place anything in your game directory or game config directory. This will produce a directory bg3-linux-ae with 2 files in it - the launch script and the .so file. The launch script takes care of appending your LD_PRELOAD as necessary without botching your existing LD_PRELOAD path (which will have things like the steam overlay).

Update your Steam launch options command similar to either (note that you will want the full path to where you put the files, and the 2 files should remain in the same directory together - these samples assume you untar it in your home directory):

~/bg3-linux-ae/bg3-linux-ae.sh %command% >/tmp/bg3.log 2>&1

or (manual preload vs script):

LD_PRELOAD="~/bg3-linux-ae/bg3_linux_ae.so${LD_PRELOAD:+:$LD_PRELOAD}" %command% >/tmp/bg3.log 2>&1

You can confirm it worked by checking output in /tmp/bg3.log, you should see some output like this:

❯ cat /tmp/bg3.log

Attempting Patch 1: ls::ModuleSettings::IsModded (Achievements)...
base_address was: 0x5635dd557000
Patch 1 match
Successfully patched memory at: 0x5635def67dee

Attempting Patch 2: esv::SavegameManager::ThrowError (Savegame Warnings)...
Patch 2 match
Successfully patched memory at: 0x5635de513970

Attempting Patch 3: new game
Patch 3 match
Successfully patched memory at: 0x5635dda79a88

(among a bunch of Steam output/noise)

In game, you will NOT see the blue gear icon to the left of your Continue/New Game menu options (that usually show when using a controller).

I wanted to play under linux, it runs better than steam/proton/dx11/vulkan, and https://github.com/evg-zhabotinsky/libspeedhack actually works great with it, so you can fast forward through boring enemy turns.

Using that with the windows/proton build stutters badly, and I don't use windows, so windows options for the same were not an option.

This is lightly tested - I was able to get an achievement (hire a merc) while my mods were still active, however per standard GPLv3 and most FOSS licenses, I assume no liability and guarantee nothing.

I can't imagine there is a chance of anything actually being screwed up, especially as it doesn't permanently patch the binary (so if things behave oddly, just remove the LD_PRELOAD from your game launch command).

Matthew Carter [email protected]

GPLv3 or later

Distributed under the GNU General Public License either version 3.0 or (at your option) any later version.