THIS IS AN ALPHA! But since NG-Alphas only accepts a preview when the author already had 1 surviving portal entry, I'm submitting it here!
When nuclear war was becoming inevitable, many people realised that they needed a bunker to protect them on day X. You are one of those people and after you created your character (note: You might have noticed that I'm using the same stats as in Fallout), you build your bunker.
The game is about planting fields, chopping wood and rebuilding an environment in which you can survive. The map that is currently generated lacks a very important thing in the game: Rivers. At rivers you can build mills and get water (which is VERY important for survival).
The tricky thing about it is that when your ActionPoints fall below 1/6 of your max. there is a chance that you collapse and spend a night in the open in the polluted environment, causing quite much damage.
Your aim is to survive as long as possible in that hostile world by working in small steps to ensure that your supplied with food, fuel and medicine. Fuel is what keeps your bunker running which makes it a shelter where it is safe to spend the night. Medicine is crucial, as it is the way of healing HP and you will often injure yourself be it when your working or when you get attacked by animals.