Dr. Kawashima's Brain Training on the DS used to the biggest-selling video game of all time in the United Kingdom. It no longer holds that title.
Instead, the honour now falls to Activision's Modern Warfare 2, which has overtaken the venerable DS title to take top spot.
It's been on sale for 41 weeks and has spent 38 of those in the country's top ten weekly sales charts. That's a lot quicker than Brain Training, which took 36 months to get to the top, a position that had been held by Grand Theft Auto: San Andreas.
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We'd love to tell you how many units its sold, but GfK ChartTrack only release that information to paying customers, and neither you nor I are paying customers.