So cold you tell me,what tile of math books I need to go over in order to make a open world (64 player) multiplayer? From what Iknow I need phisics linear algebra giometry trigonometry.Am I missing something?

It is like a survival game btw

If you are trying to make something like FarCry, then you might as well get a copy of "Tricks of the 3D game programming Gurus" by Andre Lamothe and focus on Chapter 4. It will give you some idea of what is required to make a first person shooter.