I wanted to get better with 3D in Unity, so I created this little first-person demo in between projects at work to explore advanced shaders, effects, and lightmapping. Some of the models were downloaded from free sites, others I created from scratch. The graphics and effects are downscaled a bit for the web demo, but they still hold up pretty well.
You can play the demo here! (you'll need the Unity web player installed for your browser.)
Once it loads click on the player and you should be able to look around with your mouse and move around with WASD keys.
This makes me want to make a full game!