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Close Border Diplomacy

Okay, thank you!

It's not tested yet. I plan to test and update the mod in next few days.

Hey, how is the 4.0 Compatability? Thank you!

It works with save games but it won't effect borders that are already closed.
Its not tested yet for 3.13 but I will update it in a few days.

Does it work on Save Games and in 3.13?

@ThePirateofNewMexico I'll do some testing to see what I can do without making the mod too complicated.

I would love to see this updated to include the following:
Instead of closing borders, you declare an enemy unwelcome. This means they can still pass through, but much like closing borders, you have to MANUALLY enforce it. You can then give them a warning(event that if accepted results in the fleet going MIA) that if refused gives a war goal that is simply keep enemy fleets out of your system being the war goal. A lot more complicated to code though, I imagine. Getting the AI to use it only when appropriate would be tough(No using it when your enemy heavily outnumbers you), and it should restrict war declaration to not being able to declare while you have fleets in their system.

@Reianor - your empire which is pathetic compared to mine is impeding my 300K fleet from getting to its destination. Would you rather let me move through your empire at no cost to you or would you rather I declare war and take the systems I need to move through away from you? Alternatively your empire which is equivalent to mine can charge me to move through it.

«Space is vast and it would be difficult to impede travelers from passing by a star system...»

Stellaris has a concept of starlanes, which have fixed exists. These act as natural bottlenecks. So it's actually incomparably easier to keep borders in space than on the planet, at least as far as stellaris is concerned.

Also keep in mind that in stellaris we more or less play the government. There could only be 3 types of border crossing by any of our units. Diplomatically permitted, covert, and military invasion. That permission or rather lack of it is what the closed borders are about. And there's absolutely nothing strange about it.

Besides stellaris DOES have neutral territory. It's just that AI and players always claim most of it because pretty much any star system is worth claiming. If neutral waters were worth claiming as private they'd have all been claimed as well.

Oh, wow, awesome! I actually love the concept so much that I had talked myself into updating it myself as a personal mod down the line, you're amazing!