Hello, People
I want to know how to setup multiplayer game without using any script or using less code lines. I want to find out how to make network servers which can keep up to 100 or even 1000 users without any lag and application crash. Any ideas? 
I would say browse the assets store, tutorials, and lower your standards.
I don’t know such a solution, you better buy some network assets on asset store, or study the all thing. But will be a long way up…
Tip: you will need to learn at least socket conection and webserver standards (apache, php, mysql (if you want to make it with free tools)), and it’s outside unity.
best of luck
The easiest solution is www.muchdifferent.com 's unitypark suite because it’s so scalable and can connect with 1000 players. It has utility scripts for general and common stuff like character movement and makes your job much easier. It means less code because unity can be run on server and you can share server and client code but if you are looking for a magic button, you can not find it in any part of this world. We have an article on choosing networking multiplayer middlewares based on project and middleware features which might be helpful. Take a look at it.