What are some alternative methods to implementing multiplayer?

Are there any other ways than unity's built-in system?

 

Yes

 

Do you know any examples?

 

There's...

- PUN / PUN+ / Photon Bolt
- Forge Networking Remastered
- DarkRift Networking 2 (Pro version)

...and more. A good starting point is the 'Network' category on the Asset Store.

 

Does anyone know a completed tutorial on how to create your own?

 

The easiest way to create your own networking solution would be to build a higher level API on top of Unity's included low level API (LLAPI). There's several threads and some documentation on using the LLAPI.

 

Unity3D | CREATE A OWN UNITY NETWORKING PART 1/5

 

That is not a completed tutorial it is still missing part 5.

 

Oh, my bad, he has several other ones as well though that are fully completed. He is always in Discord as well and helps out with whatever you need. One of the videos is nearly 2 hours long and I believe does a start to finish.

 

Part 5 just came out.

 

You could also just write your own. It’s just a buffered udp layer. Hell, you could use a VOIP engine to do networking.

 

That is what we are talking about.. didn't you read the thread? lol