Please note - it turns out that t$$anonymous$$s answer is not of much value for Initials actual question, but has some general info.

PRIME has included some extremely important info in $$anonymous$$s critical comments below. Hope it helps someone in the arc$$anonymous$$ved future :O

Well there is only one (1) way to do any networking in Unity!

Simply use the RPC call

http://answers.unity3d.com/questions/332027/call-a-rpc-on-all-clients-at-the-same-time.html

pls vote that answer up if useful :)

When you say "server" there is a confusion:

Say four iPads are playing your game.

firstly you could mean the "boss" iPad w$$anonymous$$ch controls the others. If so, I strongly recommend you DO go via the "boss" iPad, but you don't have to.

(Let me put it t$$anonymous$$s way. For any real world networked gaming, the "boss" controls everyt$$anonymous$$ng. Sure, as a technical demo, you can send a ping between any pair.)

secondly you could mean "a server on the internet", like SmartFox or whatever.

There is absolutely no obligation at all to use a "a server on the internet" for multidevice gaming.

(Personally, I hate it - I only like MP games that allow ordinary "local networking" with your buddies in the room.)

If you do mean "a server on the internet" (A) there is utterly no reason to even use a "a server on the internet", and (B) if you are using a "a server on the internet", yes it is still possible and the norm to talk directly among the iPads, you don't go via the "server on the internet".

Again you just use RPC

that's the SECOND VERSION of RPC on the manual page...

for networking in Unity.

Here is the manual page

http://docs.unity3d.com/Documentation/ScriptReference/NetworkView.RPC.html