Pi Servers.

[Iguana]

It's called /mastermode 1 ...

You mean this?

To make this easier to understand, I pulled this from the official documentation that comes with AC...

[SELECT ALL] Code:

mastermode N -> 0 (Open), 1 (Private), 2 (Match)

/mastermode 2

/mastermode 1

Also another thing to keep in mind, the game always tells you "The server is private" whether it's in match mode or private.

Now that's absolutely haram! Why would anyone hard code such a misleading message for match mode?