Now, developer PendAR has transformed one of the most popular titles of recent years, Angry Birds, into a 3D augmented reality video game.
The app uses a mobile device's camera to detect the printed marker that you place on the surface you would like to "play" on. Once the marker is detected, a 3D version of the Angry Birds appears and it's time to start slingshotting birds into towers.
Here is a quick demo video of Angry Birds AR. It looks like a lot of fun. Unfortunately, it doesn't seem like PendAR is planning on releasing the game to the public anytime soon.