The premise of Banished is that a small band of travelers have been exiled from their former home kingdom, and now, having only the meager supplies they could carry with them, and whatever they are able to build and gather themselves in the wilderness, must found a new settlement to assure their survival.
Different maps will have different quantities and types of natural resources to exploit. Illness, starvation, and weather are some of the greatest dangers to a settlement. Resources, such as fish populations or forest can be depleted if over-harvested.
There will be no currency, making barter trade essential, and no artifical technology levels, allowing the construction of anything you have the resources and skilled workers to create. There are 18 occupations in which townspeople can specialize. Combat will never be a focus in the game, and will never be required, if it is even added to the game at all.
The game is tentatively planned to be released on Steam later in 2013.