http://www.gamespot.com/news/2005/06/01/news_6126762.html
Not bad at all I think you'll agree.
Code:
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Last Month Rank Title Platform Publisher Release Date
2 1 Need For Speed: Underground Rivals PSP Electronic Arts Mar '05
* 2 Lego Star Wars GBA Eidos Interactive Mar '05
1 3 Twisted Metal: Head-On PSP Sony Mar '05
4 4 Untold Legends: Brotherhood of the Blade PSP Sony
* 5 Mario Party Advance GBA Nintendo Mar '05
* 6 Ridge Racer PSP Namco Mar '05
10 7 Wipeout Pure PSP Sony Mar '05
* 8 MLB PSP Sony APR '05
9 9 Metal Gear Acid PSP Konami Mar '05
* 10 Tony Hawk's Underground 2 Remix PSP Activision
Not bad at all I think you'll agree.