Parks and Recreation – Sure, this might not immediately seem like the ideal subject for a game, but think about it. 
One of the bestselling series of all time is the city planning game SimCity. Imagine that with a tiny budget and a specific focus on parks. With a little bit of work, they could add some interesting strategic elements. Do you cut a deal with Sweetums to increase your budget but lose control of a section of the park? How do you deal with the anti-gay-penguin marriage protestors picketing the zoo? Do you lose a day trying to save a gazebo, and then run the risk of not being available for any reports of broken equipment or park crime? That sounds a heck of a lot more interesting than Rollercoaster Tycoon, at any rate.
