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FrankH19: This might be very helpful as I have the same problem. However, I don't understand how to create a shortcut or to change the existing one. (The existing one is not the link on the desktop, right?)

Help would be hghly appreciated! Many thanks!
If you have the Steam version, you can go to Steam -> Library and right click on the "Doom 3 BFG Edition" from
the list. Then go to "Properties..." -> "General" and type "set r_fullscreen 2" under "LAUNCH OPTIONS" without the "".
Then just close the Properties from "X" and launch the game normally.

Be aware that the game only launches on your MAIN MONITOR in Windows 10. So if you have multiple displays, be sure
to check that the one your trying to launch the game on is set as your default (main) monitor.
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DemoniCEVL: I had quite some trouble getting the game to actually launch at all, so I'm quickly posting this hoping it may help others. I couldn't find this same error on the forums here.

What basically happened is that no matter how I tried to launch Doom 3 BFG; it wouldn't show up at all. No brief window appearing, no error message, just nothing at all.

The eventviewer would give a very non-descriptive message like:

Faulting application name: Doom3BFG.exe, version: 1.0.0.1, time stamp: 0x509d3191
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00000000
Faulting process ID: 0x20d4
Faulting application start time: 0x01d31e7ff48e80a3
Faulting application path: D:\Games\DOOM 3 BFG\Doom3BFG.exe
Faulting module path: unknown
Report ID: 4ce46565-9416-4ecb-a8f6-8e7484bdb3c0
Faulting package full name:
Faulting package-relative application ID:

The usual stuff like installing/reinstalling software like VC++, DirextX9 etc, trying compatibility mode, different drivers, completely different pc (gave the same error) didn't do anything.

Apparently this error is caused by most (all?) newer nvidia drivers not being able to launch Doom 3 BFG edition in full screen.

You can either create a shortcut or adjust the existing one and add:

"D:\Games\DOOM 3 BFG\Doom3BFG.exe" +set r_fullscreen -1 +set r_windowHeight "2160" +set r_windowWidth "3840" +set r_windowY "0" +set r_windowX "0"

replace the game path and resolution to your own respectively. (don't forget to leave a space behind the close quotation of the actual games .exe)
In my case with 3 display setup (native laptop one closed, HDMI and USB-C) this did not help.

The only thing that seemed to work is not closing the lid of my laptop's native display. Unfortunately even then the in-game offered resolutions are only up to 1920x1080@144Hz which suggests that the game is reading options only from native display regardless of the fact that it launches on my main screen which is the USB-C one (2560x1440).

Setting r_fullscreen to other values did not do anything for me.
Setting r_DisplayDeviceID to 0, 1 or 2 which was suggested on other forums did nothing as well.
Setting r_windowHeight and r_windowWidth to match my main display did not affect the game.

As for CFG file mentioned - it can be found in "C:\Users\<username>\Saved Games\id Software\DOOM 3 BFG\base" directory, but modifying it manually makes little sense as the game is overwriting it after launch.

I guess I'm stuck playing with my laptop lid slightly opened and on 1920x1080 for now.

At least I can play!
Post edited April 07, 2025 by poliusz666
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DemoniCEVL: I had quite some trouble getting the game to actually launch at all, so I'm quickly posting this hoping it may help others. I couldn't find this same error on the forums here.

What basically happened is that no matter how I tried to launch Doom 3 BFG; it wouldn't show up at all. No brief window appearing, no error message, just nothing at all.

The eventviewer would give a very non-descriptive message like:

Faulting application name: Doom3BFG.exe, version: 1.0.0.1, time stamp: 0x509d3191
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00000000
Faulting process ID: 0x20d4
Faulting application start time: 0x01d31e7ff48e80a3
Faulting application path: D:\Games\DOOM 3 BFG\Doom3BFG.exe
Faulting module path: unknown
Report ID: 4ce46565-9416-4ecb-a8f6-8e7484bdb3c0
Faulting package full name:
Faulting package-relative application ID:

The usual stuff like installing/reinstalling software like VC++, DirextX9 etc, trying compatibility mode, different drivers, completely different pc (gave the same error) didn't do anything.

Apparently this error is caused by most (all?) newer nvidia drivers not being able to launch Doom 3 BFG edition in full screen.

You can either create a shortcut or adjust the existing one and add:

"D:\Games\DOOM 3 BFG\Doom3BFG.exe" +set r_fullscreen -1 +set r_windowHeight "2160" +set r_windowWidth "3840" +set r_windowY "0" +set r_windowX "0"

replace the game path and resolution to your own respectively. (don't forget to leave a space behind the close quotation of the actual games .exe)
Tried that, got an error message about default.cfg not loading because I put it into the compatibility troubleshooter earlier.
Attachments:
Post edited April 15, 2025 by Prionnsa
If still having troubles just use one of the source ports below


https://github.com/RobertBeckebans/RBDOOM-3-BFG

https://github.com/MadDeCoDeR/Classic-RBDOOM-3-BFG
Doesn't work for Steam version.
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tirto: Doesn't work for Steam version.
Hi. I tried a lot of things and it didn't work. When I checked this forum, I also tried the resolution, and I think someone mentioned the maximum native resolution allowed was 1920x1080 at 144Hz.
So, I decided to change my graphics card settings. In my case, I have Nvidia.
Right-click on the desktop > Control Panel > Manage Display Mode > I was in Optimus. Then I tried Nvidia (the game wouldn't open) until I changed it to automatic selection (integrated graphics).
Let me know if that works for you.
P.S.: I didn't include this setting: +set r_fullscreen -1 +set r_windowHeight "2160" +set r_windowWidth "3840" +set r_windowY "0" +set r_windowX "0"

When it worked for me, it opened on a small screen, but in-game, I set it to fullscreen at the maximum resolution (1920x1080).

Los que tienen tarjeta grafica NVIDIA prueben dentro de panel de control de nvidia: administrar modo pantalla en (automática) descarte la configuración de: (+set r_fullscreen -1 +set r_windowHeight "1080" +set r_windowWidth "1920" +set r_windowY "0" +set r_windowX "0")

abrió en pantalla pequeña pero dentro del juego ajuste la pantalla completa a 1920x1080, en tarjetas AMD creo que también aplicaría en escoger gráficos integrados (intel). Creo que no perjudica en relación del apartado grafico del juego (rendimiento).
Post edited 3 days ago by skulltag199