According to Official Guinness Records,
The largest architectural videogame display measures 11,111.2 m² (119,600 ft²), and was achieved by game design professor Frank Lee (USA), who developed a version of Tetris that was played on the north and south façades of the 29-storey Cira Centre in Philadelphia, Pennsylvania, USA, on 5 April 2014.
The light grid on each side of the office building was made up of 460 LED lights creating a 20 by 23 pixel screen, which was made controllable via a computer remotely connected to the building's own network.
For a complete list of 2014 records, please visit 2014 Guinness Records in United States.