Play as a Team with other Player / IA

I think there was some mention of the systems being geared poorly toward implementing something like this, but it is a commonly requested feature and I would love to see it implemented, too.

There was a mod for this that people loved. Someone had done all the work already to figure it out. The owner of the mod stopped updating and supporting. I am working on learning how to mod so I can import their last version and see if I can update it. I really would love it if they would actually support this though.