Call of Duty: Modern Warfare 2, the sequel to Call of Duty 4: Modern Warfare was released on November 10, 2009 for the PC, PlayStation 3 and Xbox 360. The game sold approximately 4.7 million copies on its first day, making it not only the biggest video game release in history but one of the top releases of all time in any media.http://www.videogamer.com/news/modern_warfare_2_sells_4_7_million_day_one_in_us_and_uk.html

Make sure to checkout the Call of Duty Modern Warfare 2 Walkthrough.

1. No co-op in story mode
2. Separate missions reminiscent of CoD4’s Mile High Club include cooperative multiplayer
3. Snowmobiles used to escape attack in the winter Siberian environments
4. Ice walls can be climbed by alternating between the two triggers
5. Live-patching system implemented for online multiplayer
6. 60 frames-per-second
7. More detailed and longer than CoD4
8. Game includes riot shields, movable turrets and customized weapons
9. Gameplay is primarily linear with open-ended components
10. Stealth play is available
11. CoD's enemy respawn issues are to be addressed

According to Activision Blizzard, Modern Warfare 2 had resulted in more than $1 billion in revenue. Translated to unit sales, this indicates Modern Warfare 2 has not yet surpassed 'Call of Duty: Modern Warfare', which sold over 14.4 million units in 2007, and was the best-selling title in the 'Call of Duty' franchise. http://topnews.us/content/29873-activision-call-duty-modern-warfare-2-surpasses-1-billion-sales-mark

Call of Duty 4: Modern Warfare was released on Windows PC, PS3 and Xbox 360 in November 2007. It was the first title in the Call of Duty series to be set in the near future, rather than World War II. The story occurs from the point of view of a U.S. Marine and a British SAS operative as they battle in a fictional war against Russian Ultranationalists and Middle Eastern rebels. The game features real weapons and vehicles, and occurs in real-world locations like the Middle East and Russia.

The game has won multiple awards from various online gaming magazines. These include Best Graphics of 2007, Best PlayStation 3 Game of 2007, Best Overall Game of 2007, Best Shooter of 2007 and many more.GameSpot: Best Graphics - E3 '07 Editors' Choice GameTrailers.com: Best of E3 2007 Awards IGN: 2007 Game of the Year

1. Call of Duty - 2003
2. Call of Duty: United Offensive - 2004
3. Call of Duty: Finest Hour - 2004
4. Call of Duty 2 - 2005
5. Call of Duty 2: Big Red One - 2005
6. Call of Duty 3 - 2006
7. Call of Duty 4: Modern Warfare - 2007
8. Call of Duty: Roads to Victory - 2007
9. Call of Duty: World at War - 2008
10. Call of Duty: World at War: Final Fronts - 2008

Generally, Modern Warfare 2 received highly positive reviews. Overall, it was rated 94% , according to Metacritic, which calculates aggregated scores. Reviews generally applaud its in-depth multiplayer component. http://www.metacritic.com/games/platforms/pc/modernwarfare2

• Videogamer gave the game a 100 score, stating:
  

"It's hard to see the majority of people wanting to play any other multiplayer shooter until the next CoD is released, such is the quality of what's on offer here."http://www.videogamer.com/pc/cod_modern_warfare_2/review.html

• Game Chronicles scored it 99/100, with remark:
  

"This is definitely a must buy, despite the surprising $60 dollar price tag for a PC title. Grab your gear; you’re in for one hellava ride."http://www.gamechronicles.com/reviews/pc/codmw2/codmw2.htm

• IGN scored it 95, stating:
  

"For those planning to check out everything Modern Warefare 2 has to offer – online competition, full co-op Spec Ops mode, as well as the campaign – you’re looking at a no-brainer purchase. For the strictly single player crowd, however, Modern Warfare 2 is surprisingly short, and doesn’t live up to the standard set by previous Call of Duty games."http://pc.ign.com/articles/104/1043744p1.html

Many more reviews can be found at metacritic