It's a settlement/village/town/city building sim, that in theory can go on nearly forever and has huge replayability. Manage your resources carefully and decide what will be the future needs of your people. You get it right, your settlement flourishes; get it wrong and it costs people their lives. And you *will* get it wrong at some point, but hang in there and the reward of seeing your management overcome these obstacles is worth it. It's possibly the most relaxing yet rewarding game I own, and it's one of the few I go back to again and again.