Maybe someone has already implemented my second idea for a Sim game, but that seems unlikely. Most Sims these days are aimed at young, impressionable children who are likely to make in-game purchases. I certainly wouldn't want my young children to play this game:
You are a despotic dictator. Your goal is to stay in power long enough to squirrel away $1,000,000,000 in foreign banks before the people overthrow your rule. To keep the populace in control, you can offer an occasional carrot, and you can control the news and entertainment media. if you build up your secret police, you can kill the leaders of any revolt against you. Your army, if it is strong enough, can attack large-scale demonstrations. You must be careful not to move your sequestered funds out of the country too quickly! You need some of that lucre to keep your police and your army sweet, and the people will rebel more strongly if if taxed too heavily. You can make speeches that threaten the people, or that appease them. If you are lucky, some foreign country will offer you asylum before your head is stuck on top of a pole.
There is a social aspect to this game. The computer keeps a running calculation of how grungy and despicable you are, and you can compare your despicability scores with your friends.
If you win this game, you are supposed to feel awful.