Video game music is the soundtrack that accompanies video games. Early video game music was once limited to simple melodies of early sound synthesizer technology. These limitations inspired the style of music known as chiptunes, which combines simple melodic styles with more complex patterns or traditional music styles, and became the most popular sound of the first video games. The popularity of video game music has expanded education and job opportunities, generated awards, and allowed video game soundtracks to be commercially sold and performed in concert.