The US gaming population has declined by five per cent over the past year to an estimated total of 211.5 million players, according to new research from the NPD Group.
The market research firm's newest report, Gamer Segmentation 2012: The New Faces of Gamers, found that size of key gamer segments are shifting, with Mobile players now outnumbering Core gamers, which was the largest segment in 2011.
Mobile and Digital gamers were the only segments to record an increase in the number of players compared to 2011. All others (Core, Family+Kid, Light PC, and Avid PC) experienced declines, with Family+Kid gamers dropping by an estimated 17.4 million gamers year-over-year.
NPD analyst Anita Frazier said: "Given the long lifecycles of the current consoles and the increasing installed base of smartphones and tablets, it's not surprising to see a slight decline in the Core gamer segment.
"It's the revenue contribution of the Core gamer segment that continues to outpace all other segments, and remains vital to the future of the industry."
Total revenue generated from retail games, consoles and accessories across the US contracted by 20 per cent in July 2012, according to NPD.