Games That Deserve a Sequel.

Some games have sequel upon sequel, FiFA, Civilization and Call of Duty to name but a few. But which games would you like to have a sequel made. For me, it would have to be Evil genius and Homeworld. Yep, Homeworld already has a sequel, but that was a long time ago and I'd like to see another.
 Edit, a Facebook Evil genius game is apparently in the works.