The Drag[en]gine is a fully customizable game engine and game development environment designed with modularity and extensibility in mind not requiring expensive licenses.
Video showing the old industrial zone map. It's the first mission map or rather the map containing later on the first mission map. You might call this a hub map if you want. Cut together various pieces showing a little bit of the map, game controls, movie camera and some more. Excuse the bad frame rate but GLC becomes problematic to use if you fill up the GPU memory to the rim with stuff. I'm working on improving that. Also the night scenes have been heavily cut down since the video just renders all black. See the image gallery in the comment for screenshots of how it really looks like.