Digital Trends – As reported by the NPD group, video game sales over July dropped over 25 percent year over year and have fallen to the lowest levels since 2006. Total sales in July 2011 amounted to $707 million while sales just a year ago in July 2010 topped $960 million. The number of game systems sold was the source of the steepest decline at 29 percent, but last yearâs bump in sales is attributed to the release of a new Xbox 360 model. Software sales dropped from about $400 million to a bit over $336 million and accessory sales dipped just over $10 million year over year. Â