If it's open world, where plenty of players are on the same world. You can't really adversely effect that world. "Oh, I'm jusy going to build my house on this narrow pathway and block players." OR "I'm going to build my house where... oh, I bought the game a month after it came out and there is nowhere free to build a house.. damn." If there is some sort of clan hangout, they will be pre-made, and they won't be clan hangouts, they'd be faction hangouts. This is my guess. I don't know if forge will be included in this game. I really don't. I'm thinking this game will be more co-op than competitive. But we'll just have to wait and see. However, I'm still going to throw out a theory of how it could work. Maybe, there will be a coliseum somewhere in the last city where you can go for a traiditonal, Halo-like multiplayer. Where you can forge maps and what not for. But I think the main attraction of the game will be the story/open world aspect. As for an in game economy. It's basically gauranteed. Not real world money though.