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A lot of people are saying the reason this isn't selling is due to the fact that it is "on-rails".

However, there has been decent success with on-rails shooters on the Wii. Ghost Squad was the first that sold half a million, and it was considerably shorter and more shallow than Extraction.

Then of course there was Resident Evil Umbrella Chronicles which sold over 1 million, and then HOTD: Overkill which did pretty good at a half million.

So is it really the "on-rails" factor that's keeping this game from selling?