I'm not sure if they have changed something on their installer recently, but for me all of the GoG installers have worked on Windows XP in the past. Sadly I haven't got a computer with XP installed right now, but like a year ago the installers worked fine. I think the requirements on GoG site just try to tell you, that XP isn't officially supported by them anymore, so if you run into issues with an unsupported operating system they aren't obligated to offer support.

When Steam stops working on XP use SmartSteamEmu if you don't want to have to track down a crack. No sense in wasting your money again.
May be worth it to pester Bethesda to remove the Steam client requirement from their games.

DosFreak wrote:

When Steam stops working on XP use SmartSteamEmu if you don't want to have to track down a crack. No sense in wasting your money again.
May be worth it to pester Bethesda to remove the Steam client requirement from their games.

Knowing Bethesda, if they remove the requirement they introduce 20 fatal bugs in the process and then supply a patch for them in Steam only...

Last time I checked, I could still install the GOG version of New Vegas on my XP machine (SP3, 32 bit). But the GOG version of the game itself does not support XP anymore. 😢

DosFreak wrote:

May be worth it to pester Bethesda to remove the Steam client requirement from their games.

If they ever remove Steam client requirement, they'll probably introduce they games on Bethesda.net client, and that would be just another freaking launcher for games. Like I'm using two right now, and it's one too many...

K1n9_Duk3 wrote:

Last time I checked, I could still install the GOG version of New Vegas on my XP machine (SP3, 32 bit). But the GOG version of the game itself does not support XP anymore. 😢

Ouch, I didn't expect that. I wonder why the game itself would have been changed.
What exactly did it do when you tried to run it?

shamino wrote:

I haven't bought the game so I can't experiment with it. But if anybody knows of a method to install GoG's version of New Vegas on XP, or even has information to suggest that it's likely to work, then I'd love to hear what you know. Thanks.

Sorry for late answer, I noticed this topic when it was created but I had not registered yet and I thought someone else will answer for me.

Anyway, GOG version of FONV can easily be made to work with Windows XP. The problem is their Galaxy client that doesn't support XP, even the offline installer version comes with GalaxyWrp.dll which hooks into the exe and calls for something XP doesn't support. The confirmed solution is to take steam_api.dll from any steam game (not 100% sure have they been starting to lose XP support already though), rename that to GalaxyWrp.dll and replace the original with that.

If you don't have steam installed currently, someone uploaded the needed file to dropbox at GOG:
https://www.gog.com/forum/fallout_series/fall … or_gogs_package

Thanks for that info and the link! From reading those forum threads, it looks like people have gotten this game working with that fix, so next time it goes on sale I'll probably buy it from GoG.
Thanks for posting and welcome to the forum.

shamino wrote:

Thanks for that info and the link! From reading those forum threads, it looks like people have gotten this game working with that fix, so next time it goes on sale I'll probably buy it from GoG.
Thanks for posting and welcome to the forum.

Thanks! When I noticed GOG dropped XP support for FONV I started to backup every single XP supporting game I have on GOG, you never know when they break XP support if they decide to add unofficial patches and fixes for modern machines to their installers as they no longer test their games on XP.

Crank9000 wrote:

shamino wrote:

Thanks for that info and the link! From reading those forum threads, it looks like people have gotten this game working with that fix, so next time it goes on sale I'll probably buy it from GoG.
Thanks for posting and welcome to the forum.

Thanks! When I noticed GOG dropped XP support for FONV I started to backup every single XP supporting game I have on GOG, you never know when they break XP support if they decide to add unofficial patches and fixes for modern machines to their installers as they no longer test their games on XP.

True. As GoG continues to update things, and no longer cares about XP compatibility, XP might start breaking all over the place.
I've been gradually collecting installers for my GoG library but I still have a long ways to go. I don't know how I ended up with so much on there.