Still very much a work in progress, the hit console title, Portal, is unofficially making its way to Android, courtesy of a few good developers from the other side of the globe. The title is being built from the ground up using a little programming elbow grease and a lot of help from the Unity 3D engine.
You can see a little of version 0.004 beta in action in a video uploaded by the folks over at Android Police who got it up and running on their Android device. Keep in mind, a lot of the screen tearing you’re seeing is a product of the screen capturing software being used, and not really representative of the game’s true performance. If you want to give it a spin for yourself, the app can be found via the source link below.