I'm a game developer and owner of Reflective Layer, an independent game studio in Philadelphia. We started out as indie film maker but then in 2007 switched to indie games. Our current project is Prague. It's a RTS/ village building game featuring a computer simulated weather system which generates wind, rain, snow and other metrological conditions. These conditions impact gameplay in every aspect.
A quick look at our in-house created weather engine called Lightning. We're incorporating it into our upcoming Construction and Management game called Prague. Visit Reflectivelayer.com for more detail about this game.