Certainly one of the biggest games to be released this year will be Activision's Call of Duty: Modern Warfare 2 . The game is widely expected by analyst to be a huge money maker for Activision. Some analysts predict that the game will make up a significant portion of Activision's profits for Q4 2009.

The game officially went on sale at 12 am this morning and many locations reported small lines of hardcore gamers waiting at the doors of stores to get their hands on the game. About 10,000 GameStop and Best Buy locations around the world opened at midnight to sell the game.

One GameStop location at Union Square in New York City had a line of about 80 mostly young people lined up about two hours before the store opened.

One person waiting in the line said, "This is the only game I'm probably going to do this for." The young woman planned to play the game all night online against a friend.

An employee at the Union Square GameStop said, "Gamers are enthusiastic about picking this stuff up at midnight."

Sales of the game are expected to top 11 to 13 million units by the end of 2009. One San Francisco Best Buy store had about ten people lined up at 10pm Monday night to buy the game. One man waiting in the line said, "I'm going to be up all night playing it, until I crash."

Modern Warfare 2 has a long way to go to beat the top game from last year -- GTA IV. The game sold 3.6 million units on its first day and 6 million in its first week totaling more than $500 million in sales.