Abstract: A computer-controlled game system comprising a computer unit (10) which is adapted for the generation of a game sequence from at least one computer program and from game sequence data, a playback device (12) which is adapted to play back the game sequence in a projection zone and which is connected with the computer unit (10), at least one transmitter means (16) which is adapted for emitting an electromagnetic beam (S) into a predeterminable partial section of the projection zone, a detector means (18) which is adapted for the detection of the electromagnetic beam (S) when same hits the predeterminable partial section of the projection zone, said detector means (18) being connected with the computer unit (10) and adapted to transmit a signal to the computer unit (10), which is characteristic for the respective detected beam, and an alignment device (20) which is associated with the detector means (18) and which is connected with the computer unit (10) in order to align the detector unit (18) to a predetermina