The subject covers the topic well enough, but does anybody have experience with either of these and Unity? How well did it go?
I just implemented OpenFeint today - it was very easy. Of course, the instructions for Unity users are a bit scant as we aren’t their sole market, but other than that it works great.
Took me about 30 mins to get working. I now have full leaderboard and achievement support and am quite happy 
I recommend it 
It implemented OpenFeint in about an hour (first half hour was user error :P) and it was awesome to test out. Don’t think we are going to go with it but it is a very cool “product/service” to use.
My game is a score-driven game, so I think it will fit in well for me. The worst that can happen is it doesn’t work well.
Don’t forget Agon Online. I haven’t used any of the three, but it sounds like Agon has pretty good Unity support.
I’d be interested to know if there’s any problem with using more than one for a single game. At the moment, I wouldn’t know which one to choose and I’d rather give the user the option of which network to sign into.
I’m an Agon Online man myself, but honestly, you NEVER want to offer multiple social gaming systems. Besides code bloat, it just cuts down on the number of users in each pool.
The fun of social gaming is comparing your score against other people. What if the majority of people chose one network and you chose the other one?
Hi Guys,
I’m just going too add a very biased reply; If you are doing a score based app then I would say that AGON is by far the best solution, since the online leaderboards are much better than what you will find in OpenFeint or any of the other providers for that matter.
Additionally AGON provides by far the best support for Unity script - the entire API is exposed to Unity scripts and method calls are synchronous even for Unity Basic users (which normally have to use the ugly playerprefs hack, resulting in asynchronous code).
Anyway, as I said; a very biased reply
Best regards,
Morten
AGON Online developer