Jeakle: I got stuck here too. I believe they need all their needs taken care of. Housing, food, *and* a church.
OzBoz: Thanks for that, I didn't know that. However, I still do not know the meaning of the quest message to upgrade the serfs when it shows an icon of the berries (30 required) to be delivered to a hammer?????
This is the first game I have bought in Alpha, because I'm a fan of this genre, and I can safely say, that it will be the last. No guide, no tutorial, just work it out for yourselves. For 40 odd bucks, that's a bit rich.
Those are two different quests.
Turning serfs to commoners is done by fulfilling their needs, as said by Jeakle.
The 30 berries delivered to the hammer is another quest that pops from time to time, you are asked to get something (berries, fishes or bread) to either the church (the white papal hat), the king (swords ?), your people (the hammer) or to no one. To get this one done, when you chose someone to give it, you have to get the required item in a storage. When you have enough of it, you'll be able to deliver it and close the quest.