Games like Demon's Souls aren't supposed to sell well. A super hardcore, obscure RPG published by Atlus? Yeah, those games don't sell well. Except the game actually is selling well, at least by its own standards. With a little over 150,000 copies shifted in October, Demon's Souls actually made it to number eleven in the US cross-platform sales chart.
NPD gave the numbers to Gamasutra, where Demon's Souls is listed above Brutal Legend. While not in the top ten, and while the numbers aren't exactly indicative of a blockbuster, it's an amazing success for a game as humble as Demon's Souls. The fact it's anywhere on the chart is surprising and very encouraging.
We've not reviewed Demon's Souls, but if one of us ever finds the balls and time to beat it, we will do such a thing. We've certainly produced plenty of articles and videos on it though, so check out the coverage. It really is one of the best PS3 games ever made. You owe it to yourself to experience it.