Any information on this? I want to buy this game, but only if there is a fighting chance to get it working in Linux.

Yep, then I won't be buying it, until it is proven to work, preferably natively, but in wine, okay...

Sigh, really loved the originals.

I plan to wait a few days at least - I won't have much time for games until the weekend anyway. The quickest way to find out whether it has a chance of working with Wine (aside from buying it and trying it) is to check Protondb. I have checked, but no reports have come in as of this writing. I'm a little surprised since this game was hyped up, so I figured that someone would buy it on Steam, try it, and report the results shortly after release. After a few days, reports should start to come in. If the Steam version works with Proton, that will be a good sign, as the GOG version should also work with Proton and could work with normal Wine as well. If it doesn't work immediately, I'm sure there will be people working on a solution - a game this popular isn't going to be ignored. It's probably reasonably safe to buy it expecting that it will eventually work even if it doesn't now, but it isn't 100% certain, and the price of the game is a lot of money to possibly waste on this slight uncertainty. Unless someone wants to spend the money, take the risk, try it now, and report back to this thread, I recommend watching Protondb for a few days, and waiting until there are a few good reports before buying it. I'm not inclined to mess with it yet, but if Protondb looks encouraging, I'll buy it this weekend, try it, and report back.

That may as well never happen. Still waiting on that Divinity: Original Sin 2 (from Larian Studios as well) linux version or even just a word about it since... their last kickstarter update that says they "are still working on ports to other platforms".

WINE is honestly the best bet, thanks to Valve and additional tools like DXVK it became quite good.

This is why I still have not bought Divinity: Original Sin 2, and advise against buying Baldur’s Gate Ⅲ for now ;)

Yeah, I still think about getting it for Switch but not convinced about controls. The Outer Worlds feels weird. As for BG3 I don't think there's a Switch version so I guess I'll pass. A shame, it looks quite nice.

I have checked Protondb. It looks like Baldur's Gate 3 is working at least for some people and requires tinkering. The situation seems similar to Divinity: Original Sin 2, where Larian's launcher doesn't want to run, but it works when running the game directly. That game works just fine for me as long as I bypass Larian's launcher. To see if it is available in your version, type winetricks dlls list. There are reports that the launcher will work if .NET 4.8 is installed (winetricks dotnet48). Note that older versions of winetricks might not have this. However, some people are still reporting problems - I don't know if they are doing something incorrectly or if it is incompatible with some systems, or if they are just seeing bugs that Windows users are also seeing. Some of their difficulties are evidently related to how Steam works with Proton; GOG users may well have an easier time of it. I still think it is worth waiting a few days for more information, but it looks encouraging enough that I will likely buy it this weekend and see what happens.

Success!

I have gone through character creation and played through the introductory part of Baldur's Gate 3. The load screen after the first portion of gameplay took a while - be patient. I bet there are others like it. I have no complaints aside from load times - performance is great, and there have been no crashes so far. Here is my system information. If your system is significantly different, you may have different results.

Ubuntu 18.04, Intel Core i7-2600K 3.4GHz, 16GB RAM, NVidia GeForce GTX 1660Ti, 1920x1080

Not an extremely high-end system, but a decent one. With the size of monitor that I like to use, there is no need to go to higher resolution.

Please note that people with AMD graphics cards have reported some issues. See Protondb for more information. It looks like using Glorious Eggroll's Proton fork, specifically, Proton 5.9-GE-7-ST might be a solution, but I obviously can't test this.

Here is what I did.

I installed it manually in its own Wine prefix, and I didn't load any libraries or do anything else unusual. It's big, so it takes forever to install. After installation, I added it to Lutris. I used Windows 7 mode, but Windows 10 mode probably also works. Normal Wine didn't work - it crashed when attempting to start character creation. The current release of Proton 5.0 on Steam worked perfectly. If you have installed Proton through Steam, Lutris will find it and you can use it for non-Steam games. Larian's launcher does not work - run the executable bin/bg3.exe directly instead. This is the Vulkan version. The DirectX version crashed after character generation and the following cut scene. I turned off DXVK in Lutris because it shouldn't be needed for the Vulkan version.

The launcher supposedly requires .NET 4.8. For some reason, .NET installation is broken in Winetricks on my system right now, and I haven't wanted to bother to install it manually yet. I might try it one day, but the launcher doesn't seem necessary. It wasn't necessary for Divinity: Original Sin 2 either.

I have not tested multiplayer, and I have no plans to do so, as the multiplayer option is of no interest to me. If others test it, I'm sure people here will appreciate reading about it.

I should have more time to play it this weekend, and I am looking forward to it. The introductory part of the game is quite dark, even for fantasy role playing games, and it is quite compelling. I expect to find bugs, as Windows users have reported plenty. If bugs rear their ugly heads, it might not necessarily be a Wine problem. At least it is working flawlessly so far, so I am optimistic.

Good luck to others who give it a try at this early stage. Again, results may vary depending on the system, so my good results don't necessarily guarantee success for everyone, and owners of AMD graphics cards might be in for a hassle. If anyone manages to get it to work with normal Wine, I'm sure instructions will be appreciated, as some people might not want to deal with Steam and Proton. For me, it isn't a problem - if Proton does the job, I won't argue with it, and I'm grateful to Valve for the contribution they have made to Linux gaming.

to be honest your best bet at a playable game is prob Stadia... assuming you have the internet

This is good news! Thanks for your work to get this running and posting the helpful tips :-) I'm not expecting to see a Linux native port of D:OS2 until after BG3 is released. I would think that is probably tying up most of their studio resources atm. I'll keep my fingers crossed though that they show the Linux community some love.

Could you, please, share the prefix? I have already failed several attempts to install the game.

it was 4 years ago so whatever hack isn't going to work the same now... thats the joy of Linux systems not being a standard