Investors in video-game stocks might end up with a case of a sour stomach after digesting the latest domestic sales figures from research firm NPD. According to Reuters, overall video-game revenues in March dropped 17% on a year-over-year basis. Indeed, it's not something that shareholders of Sony (NYSE: SNE), Nintendo (OTC: NTDOY), or Microsoft (NASDAQ: MSFT) want to see.

Shareholders of Nintendo, however, will be glad to know that their company once again dominated the charts. The Wii sold over 600,000 consoles. Xbox 360 sold over 300,000 units, and PlayStation 3 moved over 200,000 systems. As for the PlayStation 3, well, it's frustrating statistics like these that are causing video-game execs to publicly call on Sony to do something!

GameStop (NYSE: GME) reported earnings for Q4 and the full fiscal year on Thursday. As expected, they were very good. Why shouldn't they be? The country is in love with video games, and systems by Sony (NYSE: SNE), Microsoft (NASDAQ: MSFT), and Nintendo (OTC: NTDOY) are keeping a lot of people from all age groups occupied. Including myself. I just recently completed Resident Evil 5 for the PlayStation 3.

The video-game industry had another good month.

Sales figures for February show that the Nintendo (OTC: NTDOY) Wii sold the most consoles (like anyone was surprised by that?). Over 750,000 units were purchased, according to statistics from research firm NPD.

The Xbox 360, which is manufactured by Microsoft (NASDAQ: MSFT), sold over 390,000 consoles. And then we have poor Sony (NYSE: SNE), which makes the PlayStation 3. That system found a little over 275,000 willing buyers.