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In Thursday's release to the press, the NPD Group provided the top 10 software titles, ranked by unit sales. Below is the extended top 20 chart provided to Gamasutra, with the caveat that NPD does not generally provide unit sales for games outside of the top 10.
As expected, Star Wars: The Force Unleashed from LucasArts was the top seller for the month, leading on the Xbox 360 with 610,000 copies.
Three other versions made the top 20: the PS3 version (#5 and 325,000 copies), the Wii version (#9 and 223,000 copies), and the PS2 version (#14 and over 100,000 copies, according to notes from Michael Pachter of Wedbush Morgan).
With the Nintendo DS and PSP versions below 100,000, Star Wars: The Force Unleashed probably sold around 1.4 million copies during its launch month.
A now common trio of Nintendo Wii exclusives populated the top 10: Wii Fit (five months on the chart, sales of 2.3 million copies), Mario Kart (six months, 3.1 million copies), and Wii Play (20 months, 2.7 million YTD and 6.9 million LTD).
Wii Fit sales accelerated again in September, up from 98 thousand copies per week to nearly 104 thousand copies a week. Mario Kart for the Wii has sold one copy for every two Wii systems sold in the past quarter, the kind of recurring role that Wii Play has held for over a year and a half.
The software release of Rock Band 2 for the Xbox 360 in mid-September sold well enough to reach #3 on the chart, with sales of 363,000 units. (The hardware bundles will go on sale this weekend, on 19 October.)
The Xbox 360 version of Mercenaries 2: World in Flames, developed by Pandemic and published by Electronic Arts, appeared at #6 on the chart after moving 297,000 copies. (The PS3 version sold somewhere between 100,000 and 150,000 copies and ranked #16 for the month.)
Finally, last month's hit game, Madden NFL 09, took three spots in the top 20 for September: the Xbox 360 version at #8, the PS2 version at #10, and the PS3 version at #11.
Warner Interactive's LEGO Batman was available for 12 days during NPD's September period, and three versions ranked in the top 20. The PS2 was the lead version at #12, and the Wii and Xbox 360 versions ranked #18 and #19 respectively for the month.
Given Mr. Pachter's comments that eighteen titles sold more than 100,000 units, we can say that the PlayStation 2 and Wii versions of LEGO Batman had sales over 100,000 each, while the Xbox 360 was probably just below 100,000.