Hello.

As the title says, I would like to know how to lunch OBSE instead of the default Oblivion through GOG Galaxy.
I know that the game has no achievements to speak of on PC, but the option to have cloud saves is better than having to backup my save files manually.
Unfortunately, I don't even know what command line arguments are, so a typed out example that I could just copy would be most helpful.

Thank you for your time in advance to anyone willing to help.

In case anyone stumbles across this topic, here's a way how to make Galaxy launch OBSE instead of Oblivion.

Go to Oblivion's folder (in my case its path is this "C:\Program Files (x86)\GOG Galaxy\Games\Oblivion") and find the numbered INFO file (in my case it's called "goggame-1458058109").

Now exit Galaxy, not just close it, shut it down (in the task bar right click its icon and select "Exit").
Then open the INFO file, search for this line "path": under "category": "launcher" and "category": "game".
Make both "path" lines like this "path": "obse_loader.exe",

Save the INFO file and relaunch Galaxy, it will now launch OBSE instead of Oblivion.

Edit: I'm glad this is helpful to people :), but huan deserves most of the credit since they initially told me about this method.

Thank you so much!

You're welcome, but huan is the one who deserves the credit as they told me of this method.

P.S. The same method also works for Fallout 3 with FOSE instead of OBSE.

Thank you very much ! ;)

So it also works in Galaxy 2? O.O
Glad to hear it :D, though I've yet to test it myself.

I haven't tried it yet GOG Galaxy 2. Sorry.

and to directly launch "Oblivion.exe" via GOG? I tried to modify the .info file:

"category": "launcher",
"isPrimary": true,
"languages": [
"*"
],
"name": "The Elder Scrolls IV: Oblivion",
"path": "Oblivion.exe",
"type": "FileTask"

But it does'nt work... It starts the launcher first... Annoying for mods

Thank you

EDIT: I found ! :

Delete :

{
"category": "launcher",
"isPrimary": true,
"languages": [
"*"
],
"name": "The Elder Scrolls IV: Oblivion",
"path": "OblivionLauncher.exe",
"type": "FileTask"
},

And put:

{
"category": "game",
"isPrimary": true,
"languages": [
"*"
],
"name": "The Elder Scrolls IV: Oblivion",
"path": "Oblivion.exe",
"type": "FileTask"

So Primary (in bold) replaces Hidden

Goodbye the launcher ;)

That's alright and I'm glad to hear you were able to figure it out. :)

Since this worked for Dungeon Siege 2, it should work for Oblivion (and possibly Morrowind) and Fallout games, now that Galaxy supports multile executables.

1. If you want to use Galaxy: find Oblivion in Galaxy, click on the small button right of the purple "Play" button and go to "Manage Installation" and "Configure".

2. (Lauch Parameters -> "Custum executables" need to be ticked/enabled). Scroll all the way down to "File 4" (Or whatever number comes after the already used lines). Click to the field beside it and guide it to "obse_loader".

3. Want Galaxy to launch that every time? Below "File 4" and "My Label", you'll see "Default executable", click that.

4. Once you click "Play", OBSE will launch.
If you use a new line and leave the already filled ones alone (File X - I'd have to check for the exact number), your playtime will also be logged normally. :)

I'm positive the same method will work with Fallout games as well (replace OBSE with the corresponding program). :)

On the weekend just gone, I installed Fallout 4 GOTY on my PC. Launching the game in Galaxy, it would always launch the game launcher, wasting time to get to the game.
So, I read through this thread to see what the solve is, to launch a specific game .EXE for an installed game in the classic GOG Galaxy 1.2.
I found some of the info I needed, but something in it felt amiss, so trial and error was necessary.

Alsurfe's post from April 05, 2020, is a partial solve.
He suggested deleting the launcher section, and changing the
"isHidden": true,
under the game section to
"isPrimary": true,

This feels amiss in case Galaxy need both sections to be present to launch a game.
Reading through the Galaxy .INFO file, I saw the two lines involved in launching the game launcher, instead of the game .EXE.

Under the launcher section there's
"isPrimary": true,

Under the game section there's
"isHidden": true,

So swapping these 2 lines around, makes sure the game launcher stays hidden, and clicking the PLAY button in Galaxy, goes straight to the game itself.