Ok, I finished the game (awesome!). But I didn't get the conversationalist achievement. Anyone knows, how to get it after finish the game?
I heard someone say that I should start again from zero. But, if I do that, I have to unblock ALL the achievements again or what I got still running?
I'm new in 360, if someone can help me, would be great.

Humm.. by the way, I had the same problem whith "Hungerer of knowledge"

thanks.