Algodoo

The bomb shelter with all the amenities for a long stay (from one month or more).Inside there is a bed,a powerful computer with three terabytes of games (including GTA 5),toilet and other appliances.Electricity comes from solar panels and windmills.
For longer life in the shelter need to bring as much food and water as you have enough for the entire stay.
This building is of a humorous character,I know in real life have a lot to think about,but it's the same game