Probably not important at this stage, but I can run multiple copies of the game at the same time. It doesn't check for a running instance.
Re: Multiple instances
Posted: 06 Nov 2015, 13:04
No it doesn't and yes, multiple instances are possible. The only issue would be that you can't host or join more than one game at a time if your router blocks that (or Steam does, which ahs been known to happen).