WEBAug 18, 2017 · Blue Byte Software GmbH (from 1988-02 to 1999) Overview edit · view history. Ubisoft Düsseldorf, originally Blue Byte Software, is a game developer based in Düsseldorf, Germany. The company was founded in October 1988 in Mülheim by Thomas Hertzler and Lothar Schmitt, both former employees of Rainbow Arts.