So do I really need to install GoG Galaxy to play online?
I'm already running the steam client...can't this game (bought on GoG) be made to work with Steam Client for multiplayer?

Even if I launch if from GOG galaxy, it still complains about not being launched from there and refuses to start multiplayer. Whats the deal with needing galaxy for multiplayer? Almost like DRM...

You can use LAN for multplayer without any client or authentication, it kinda goes without saying if you are playing online that you would need to connect to some sort of a service for that and for that you "need" to authenticate and I assume the easiest way for the dev team of the game is to use the built in authentcation of clients like Galaxy, steam, origin etc.

IT IS DRM False, LAN has never worked. I know I've been trying to get it to work since the official launch. Furthermore the online list shouldn't go through a client for a game that is supposedly DRM Free.

I admit I have not tried it after release but it did work fine in beta.

Edited:
I just tested setting up a LAN game, it worked quite well for me.

tx3000 if you are having problems with starting a LAN game then my first guess would be firewall problems.

Don't talk down to me like I'm an idiot. I've been dealing with LAN for years I know exactly how they work and how to set them up. The LAN on this game does not work.

http://www.grimdawn.com/forums/showpost.php?p=359283&postcount=23
Crossplatform gaming is on radar, with no ETA.

LAN on this game does work, at least for an year.
I have read your 5-7 posts and already think that you are an idiot :\

Dude, I just used LAN in the game, right this minute, I used it in beta back in the day, both on my local network and also through hamachi.

I am baffled that your first thought was that I was implying that you are an idiot just because I mentioned a possible cause for your multiplayer problems, I have ZERO knowledge about what you can or can not do, so with that information I made a guess because most people having problems with LAN,are having them because of firewall issues.

The LAN in this game is working just fine, you are wrong about the LAN not working at all, the problem is on your end and needs to be fixed there.

Also, not knowing how firewalls and networks work, does not make a person an idiot.

thats now how it works.. All older games which work in multiplayer DOESNT have any servers because game devs shut it down decade ago! But multiplayer NOT LAN, still works!

Example: quake3

Well this is kinda how it works, you are talking about a client-server architecture, that has nothing to do with LAN other than it could be located on a LAN, LAN means Local Area Network, it is a range of IP addresses that are on the same network defined by the subnet mask, you are describing dedicated online servers, LAN is something else.

Multiplayer can be played both online (Making it a Online multiplayer, where there is a Server-client architecture, here the server component is spun up online (D3)) and also on your local network (Making it LAN multiplayer, this can be both Client/server-Client or Server-client architecture, this is where one of the clients is also a server or there is a dedicated server that clients connect to (Terraria if memory serves, quake etc)).

LAN means you play multiplayer on your local network, when it comes to solutions like Hamachi and NeoRouter there is a virtual private network that is created to simulate a LAN for computers that or on different networks.