FAQ
Question
What is the purpose of visiting a friend's Mother Base?
Are there any co-op boss battles, similar to MGS: Peace Walker?
PS4PS3XBOX 360XBOX OnePC(steam)
Answer
There is no co-op in the game. However, visiting a friend's Mother Base can give you ideas for how to build your own FOB defenses, and of course, having a friend visit yours allows you to show off your creation.
Is the problem solved?