DarkTris is a Tetris variant that is being projected on a blank wall. The game board itself is dark and can only be illuminated by moving the “digital flashlight”. The goal is to place as many tetrominoes as possible under a given line. Grabbing and discarding of blocks is achieved by conducting certain gestures.

DarkTris was developed as part of a university project in 2011, the topic of which was New Interaction Patterns for Mobile Projectors. The game is controlled with a combination of mobile projector and Wii remote. The wall features a matrix of infrared LEDs covered with a white sheet that enable the positional tracking of the Wii remote.