Debugging Multiplayer Issues with One Installation

[GarenWyvern]

I have a bug in a mod I am creating that seems to only be present in multiplayer. I do not have testers readily available to test every little tweak I make over and over (which I do not blame them for not wanting to, hah). I bought Factorio from Steam, which does not seem let me log into the game twice to test my mod in multiplayer. Is there a way around this?

[Bilka]

Connect your steam account to an account on Factorio.com and download the zip version there. Extract said zip twice, to two different places. Dont log in, simply host a LAN game in one of the instances and turn off user verification when doing so. Use a different name (again, no logging in!) in the second instance and join yourself via the LAN game search. Voila, you have a "multi"player game :)

[GarenWyvern]

Works like a charm! Thanks so much!