Kids are back in school and the weather’s cooling, so it must be time for rowdy video games.
Like “Gears of War 3,” a raucous, sci-fi shooter that Microsoft is releasing Tuesday, starting its Xbox holiday season with the clatter of automatic weapons and roars of attacking aliens.

“Gears” follows a squad of muscle-bound soldiers fighting to save humanity with an array of weapons, including the game’s trademark assault rifle with a chainsaw bayonet.
But the real challenge facing “Gears” and other blockbusters coming out this fall is how much they can revive game sales, which plunged over the summer.
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