Shooters generate huge amounts of money for developers and one of the strongest selling shooters in years has been Call of Duty: Modern Warfare 2. The game racked up $310 million in sales in the first 24 hours it was out, has gone on to sell over $1 billion globally and is still selling well.

Sony is set to enter into the shooter market with a new game called MAG (Massive Action Game). The title is targeting the average gamer, said to be a 34-year-old male. MAG pits up to 256 players in one combat environment and uses a global oil crisis as the catalyst for war in real world locations.

Zipper Interactive -- developer of MAG -- president Brian Soderburg said, "I think what we have done differently ... is that we've created real cause and effect within the many different objectives and sub-objectives that have to be done to win the war, just like a real battlefield."

The game targets the core audience of gamers, 13 to 34 year old males. However, demographics are changing according to game developers and more and more women and players over the age of 34 are starting to play games.

Michael Cai from research firm Interpret said, "The core audience of shooter games remains 13 to 34 year old males, who make up more than 60 percent of the total audience, but the genre has broadened its appeal in recent years with popular titles such as "Call of Duty" and "Halo." Older males and even female gamers have latched on to the genre. A big part of the growing popularity of shooter games can be attributed to online multiplayer functionalities."