Industry sales trackers NPD Group, GfK Chart-Track and Enterbrain collaborate once more to deliver their latest Top Global Markets report covering software sales across three major regions; North America, the United Kingdom, and Japan. According to their findings, all software markets suffered a 6 percent decline in unit sales combined for the three month period from July to September.

Of the three global markets, Japan proved to be the healthiest thanks to a 15 percent year-on-year increase in third quarter software unit sales. Year-to-date sales however dropped around 9 percent compared to the first three quarters of 2008.

North America and the UK suffered year-on-year declines in both quarterly and year-to-date software unit sales. The UK in particular faced the greatest drops, with third quarter sales down 19 percent and year-to-date sales declining 13 percent.

While North America and the UK still enjoyed great software unit sales from high profile releases like Madden NFL 2010 and Halo 3: ODST, it was Japan that produced the single best-selling title across all three regions, Dragon Quest IX. The DS RPG racked up lifetime sales of just under 4 million units since launch at the start of the calendar quarter, further underlining the series' popularity in Japan.