What that really means is that we can’t just bake the UI into some C code. Even a DLL system would have issues because we are cross platform. We need a flexible and extensible system for building UI that’s available everywhere. [..] So given all of that, what’s a logical system for us to use? We could certainly build a custom system and embed lua for example. Or we could license a 3rd party library like Scaleform and use Actionscript. Or we could do the obvious thing and simply use a web browser as the UI system. So that’s what we’ve chosen to do. Basically the client is a transparent web browser (webkit) window over the top of an OpenGL context. All of the front end UI and the top level game UI is being written in Javascript.