The "Call of Duty" franchise is a perennial blockbuster, with more than 65 million units sold so far in the United States and hordes of fans lining up each fall to buy the latest installment of the war-simulation video game. Now, Activision Publishing will find out whether fans who are accustomed to dropping $60 on a new "CoD" game each year will also cough up an extra $50 to keep their game content fresh.

The much-hyped "Call of Duty: Modern Warfare 3" is set to arrive in stores on Tuesday. As usual, players get inside the helmets of soldiers -- in this case, fighting a near-futuristic global war against Russian forces who have invaded multiple countries, including the United States.

While all eyes have been on EA's Battlefield 3 of late, Activision's FPS juggernaut is right around the corner, too, and the latest trailer indicates the publisher plans to pull out all the stops for Call of Duty: Modern Warfare 3. See Makarov and Capt. Price go at it in the MW3 story trailer, Redemption.

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Call of Duty: Modern Warfare 3 is in development for Windows PC, Xbox 360, and PlayStation 3. The game is set for launch on November 8.

The first new multiplayer maps for Call of Duty: Black Ops are available for download today, but as some players discovered this morning, the $15 pack couldn't be downloaded from the Xbox Live Marketplace.

After being inundated with complaints from anxious Black Ops players early this morning, Microsoft's Xbox Support team reported that downloading the map pack from Xbox Live was causing some problems. As it worked to fix the issue, Support directed gamers to the Black Ops in-game store. As of 10 a.m. EST, it appeared the issued had been resolved.

Activision set the trend with Call of Duty: Modern Warfare 2, and it continues with Black Ops. The First Strike map pack for Black Ops launches tomorrow on the Xbox 360 for $15, and the release of the paid DLC will be followed by a Black Ops double-XP weekend.

Xbox Live Director of Programming Larry "Major Nelson" Hyrb made the double-XP weekend announcement via a podcast on his blog, and Treyarch Community Manager Josh Olin followed up with a confirmation tweet.