Hello, I was wondering if the offline installers will allow me to play online. I have a 100GB limit on my internet and wish to purchase two copies, but DLing this 66GB beast twice just wont work. However the offline installer says that it will not work online, I need it to play online, the two of us do, can I activate the offline downloads somehow?

Where did you see that? I can't find it anywhere.

Anyway, the purpose of offline installers is that you can download them once and install them for as many times as you want. There is no difference between them and Galaxy installations.

But you may or may not have to use Galaxy or at least the Larian launcher for the multiplayer feature. I can't be sure about that just now as there are no active lobbies by the time writing and I was able to create a lobby myself by running neither of those two, simply because there is a LAN feature (I assume that's the reason).

for crossplay you will need an account ... offline installer was nothing to do with it

Anyone having problems installing BG3.

I have downloaded all parts of the Baldur's gate installation, how ever when i try to install the installer ask's for the location of part 17

Of course it will work...youre installing offline. You can always go online for multiplayer.

yes

Maybe you got pieces that belonged to different releases? When it says something is missing then something is missing.

That one piece is probably corrupted, or verify that all the pieces are from the same version.

I tried it too, and the last one labeled #28 on the download page (identifyable by being 2.4gb) is has actually -27 at the end of the filename

then there is -9 and -9 (1) (#10 turns into a 9)

10 itself is missing

also there is 21 and 21 (1) and from there the whole order moves one back (making -28 miss)

They screwed up their offline installers, but adfvertise with it....
Seems many people reported this yet they do nothing.

Offline downloads are a myth... Not... if installing does not work..

Note that on the GOG site the files are numbered 1-28, starting with the exe file. But in the downloaded file names, the exe file has no number while the bin files have the numbers 1-27 embedded in their names. This means that, for instance the file on GOG listed as (Part 3 of 28) produces a file named
setup_baldurs_gate_3_release_-_v4.1.1.3630146_-_patch_patch0_hotfix2_(64bit)_(66633)-2.bin. This is confusing even to me. But you just need to understand it once and then be on the lookout for any bad assumptions you might make when looking at file numbers.

I just last night completed downloading the current installers and installing using them and launching the resulting game (though I did skip using the Larian launcher because of all the error messages it throws). I had to groom the download process a bit because on a few of the files my download manager says GOG sent an error message that I did not have authority to access the files. So I deleted them from my download queue and I rescheduled those few files and they downloaded fine the second time. Dunno how this happened, exactly.

When you get an error like yours, the *first thing* you do is pull up the folder and sort by name. Then go down the list and make sure that all of the file names (except the exe) are named exactly the same except for the number. Rename anything that is off to the name it should be. If you get a file named something like
setup_baldurs_gate_3_release_-_v4.1.1.3630146_-_patch_patch0_hotfix2_(64bit)_(66633)-2_2.bin, then it means you downloaded this file a second time when there was already one there. It supplied the "_2" because it could not download a second version with the same name. So figure out which files are missing (it's likely that you have duplicates because you clicked twice on the same file, while failing to click on another one). And download them so you have a complete set.

The *second thing* you should do is verify that the size of each of these files is exactly the same (except for the exe file and for the very last bin file which will be shorter). If any of them are a different size that probably means it is borked and you should delete it and download a replacement for it.

Something else I like to do is, when the installer is running, make sure you tick Verify Files. It adds another 10 or 15 minutes to a big install like this, but it gives me a bit more peace of mind.

Hope this helps.

-edit- added a little formatting

-edit #2- I just noticed that my computer and yours have different policies when naming duplicate files. It looks like mine adds an "_2" while yours adds a "(1)" to the file name. I think so, anyway.