Complex sentence: Danny Johnson joined Gaijin during the fifth game in the series, and after all six games in the series were completed, Osborn left Gaijin Games to join another independent studio known as Tracer.
Split into simpler sentences: Danny Johnson joined Gaijin during the fifth game in the series. After all six games in the series were completed, Osborn left Gaijin Games to form another independent studio known as Tracer.