There are many forms of interaction between players made possible in games; competitive, cooperative or neither one.
There are also many different levels of interaction required in games, while some require none, other encourage it and finally some demand it to a great extent to be able to play the game.
If the game requires social interaction with other players, it also needs a healthy player base. And that… Can be a bitch.
There has been a lot of talk about games and social networks lately. The Xbox 360 recently got its own share of facebook, iPhone games have been bolstering sales with facebook and twitter integration and blockbuster titles such as Uncharted 2 – Among Thieves can twitter the players game progress - if the player wants to. But what about the games that are integrated into facebook? What are they? What could they be?