Last year San Diego-based games developer Psyonix got in touch about licensing a couple of tracks in a tech demo/game called Whizzle, showcasing the Unreal Development Kit. Being a demo, it's just a single level (for now, at least), but I'm glad it came to fruition nonetheless. Here's a short vid of Whizzle in action:
If you're interested in learning more about the UDK and fancy dipping your toes into the world of game development, then this video of Dave at Psyonix gives you a quick intro to the platform. The UDK is free to download too, so given a little free time there's nothing stopping you from crafting your own titles.