I want to create a multiplayer game using facebook graph api.
please give me suggest how can i do?
If i were you i’d go with prime31 products like “Social Networking (Twitter and Facebook)” here:
Programming Graph API stuff yourself is a huge pain in the butt … been there … seen that. 
@prime31: If you read this please create “share this” links for single products
I am also trying to do the integration of facebook twitter, but i have seen in all the forum’s about the prime31 only. Is there no way around to work this out.
Yeah one more thing, is prime31 plug-in is a one time buy or just for single title.
@Lav I was trying to do this, try if this works out for you, i think it won’t give much flexibility with multi-player.
http://www.ifc0nfig.com/accessing-facebook-within-unity/
It’s a one time buy.