Writing a Turn-based strategy games can be quite a daunting process; there’s the map, the AI and the all-important GUI elements. Over at the Freeware Genius you can find 19 such games. Of particular interest to me is 8 Kingdoms, which reminds me of the Total War series, and PHP Diplomacy. I would be looking over them to see which one I could base my own game on. Hopefully I have luck!