ZDoom multiplayer setup, troubleshooting and FAQ

UDP hole punching is a gateway traversal technique, not something you yourself need to setup. Once you've foward the necessary port on the host, you're set (so nothing changed from doing a 2 player game). I'm a little confused because nowhere has anybody implied otherwise.

"A person joining a game does not need to specify any additional parameters aside from loading any custom WADs or DeHackEd patches that the host is using."

ZDoom needs a lobby to address this, and I think that the Tox protocol is a reasonable solution as it seems to work even on LAN, the rest is a plugin to show rooms, latency, handle command line parameters and download mods using something like wad-archive.

Did not find another place to ask this: Which is the command I need to use to make the ¨players block each other normally¨. I want to use this feature and block my friend when playing multiplayer.

That's already the behaviour in Doom since 1993. ZDoom naturally keeps it by design.

Sorry as doomseeker allows to use this feature I thought that there was a CVAR I was missing to create this physic behavior. Thanks.

Does ZDoom have -extratics? Not -extratic, -extratics, as in -extratics 3 -dup 2. Those are the settings I use in crispy doom, and since I hear the netcode of zdoom isn't that different, I'm curious if -extratics exists, especially since it isn't mentioned in the wiki.

I don't believe you can configure extratics, the only option you have is extratic, sadly

So how is zdoom's netcode compared to crispy doom anyway?

Well, at the end of the day its a P2P networking system where all clients tell every other client what inputs they performed and then every client runs the game using the collected input (though there's a little more to it to keep it smooth). I believe crispy doom does something similar (since its what vanilla did), though a lot of implementation details likely vary.

So what's ZDoom's closest equivalent to crispy doom's -extratics 3 -dup 2?

Before you ask, I don't want to touch Zandronum until it has OpenAL Support and gains 2.8.x's ARM fixes.

Last edited by Danfun64 on Tue Oct 18, 2016 1:54 pm, edited 1 time in total.

Wait, where do I type the codes to set up\join the game in? Do I do it in the game console (pressing '~' key while in a level) or do I do it some where else?

You have to do it from the command line.

Player 1 types: zdoom -file <wad> -host <number players> i.e. "zdoom -file worlddomination.pk3 -host 3"
Players 2 & 3 need Player 1's IP address, then they type zdoom -file <wad> -join <player 1's ip> i.e. "zdoom -file worlddomination.pk3 -join 123.45.67.89"

More info: Multiplayer

What do you mean by command line? The only place I know that you can use to enter commands is the drop down interface you get when you press the '~' key, sorry for being some what of dufus when it comes to things like this...

What do you mean by command line? The only place I know that you can use to enter commands is the drop down interface you get when you press the '~' key, sorry for being some what of dufus when it comes to things like this...

The "command line" is usually for options and switches being given to a program before it even starts, usually by creating a shortcut and editing it, using the Run dialogue, or with a launcher. See this wiki article for more.

Oh nice!
Thank you, also, if I want to make a batch file that automatically opens a multiplayer game, do I just type in the commands from the first post on this topic into the bat file?