U.S. sales of video games, consoles, and accessories slowed in February, market research figures showed.

The industry posted a 10% revenue increase over the same month a year ago to $1.47 billion, the NPD Group said. In January, sales at U.S. retailers rose 13% from a year ago to $1.33 billion.

Nevertheless, the industry as a whole remained strong.

"The U.S. video-games industry continues to post strong year-over-year comps despite the tough economy," NPD analyst Anita Frazier said in an e-mail sent to media late Thursday. "Unit sales increased even more than dollar sales did, reflecting a slightly lower average retail price for all categories as compared to last year."

Sales of consoles rose 11% to $532.7 million. The Nintendo Wii and the company's portable console, the DS, continued to lead the market in February in terms of unit sales at 753,000 and 588,000 units, respectively.

While unit sales of Microsoft's Xbox 360 and Sony's PlayStation 3 were considerably less, both sold relatively well.

"The Xbox 360 realized its biggest non-holiday sales month, save for September 2007, when the Halo 3 [video-game] release brought in a large group of new owners," Frazier said. "Compared to last month [January], the PS3 realized the greatest month-over-month unit sales increase of all platforms."