title: Built-in Multiplayer in Unity3D without a Server?
body: <p>I heard <strong>Unity3D</strong> has a <strong>Built-In</strong> Multiplayer functionality and it can provide the service <strong>without a server</strong>. But I couldn't find any information about it, all the turtorials I found were just about working with Photon(PUD) or Google Services. I know Photon is good, so I just started to study it and have a plan to use it.</p>
  
  <p>However I still want to write some very simple apps not using servers, something like One VS One Rock Paper Scissors game. Using Photon must be better on performance but in some cases like I said above, it seems to be too much. In addition, CCU of PUD for free users is just twenty, so it means only ten groups can play at the same time, Rock Paper Scissors game, for instance.</p>
  
  <p>I saw some said it's possible without a server, but some other said impossible.</p>
  
  <p>What is right?</p>