Multiplayer

[qqnolnh-l.2]

I don't understand how to run DOOM online (cooperative)? Is it possible at all?

[Hekksy]

Very hard with the default steam way. Get a source port that focuses on multiplayer. http://steamcommunity.com/groups/odamex

[Kaworu Nagisa]

Get Zandronum, its a nice program that allows you to play with other people, along with a bunch of cool mods to try out. But you'll need to get Doom II if you haven't already.

[Hardbash]

zandronum.com
Everything else is outdated I think, this is the most recent and regularly updated source port.

[EmotionallyBroken]

thanks