Electronic Arts Inc shares slid nearly 7 percent on Wednesday after the game publisher's strong quarterly results failed to quell concerns about the industry's health and the company's game slate.

The Madden football publisher posted better-than-expected results in the June quarter and managed to double its revenue on titles for Nintendo's popular Wii console.

But Chief Executive John Riccitiello warned analysts on a conference call that the industry remained weak and retailers continued to be cautious about ordering.

The company said it now expects 2009 sales of packaged software in North America and Europe to be little changed from 2008, versus a previous forecast for low- to mid-single-digit growth.

Although EA's non-GAAP revenue climbed 34 percent on strong sales of The Sims 3 and EA Sports Active, the company indicated some weakness in sales of the recently released NCAA Football.

Analysts also expressed concern about titles for the remainder of the year.

Electronic Arts lacks a critical mass of upcoming must-have titles with top-selling potential, particularly during this year's holiday period, MKM Partners analyst Eric Handler said in a research note.

As such, we would not be surprised to see retailers take a more measured approach to stocking the company's games.

Handler also said EA's catalog business was 18 percent of revenue in the June quarter, down from 28 percent last year.

The video game industry as a whole has had a difficult year as consumers impacted by the economic downturn have been more reluctant to spend. June U.S. video game sales registered their biggest drop since 2000, according to research group NPD.

Shares of Redwood City, California-based Electronic Arts fell $1.51 to $20.38 in midday trade on the Nasdaq.

(Reporting by Gabriel Madway; editing by John Wallace)