Downloadable content (DLC) is supposed to add to a game. New maps, weapons, game modes and cosmetic upgrades can keep players interested in a game long after the original release date. A lot of developers used to include tools into games to allow customisation and map creation and sometimes they would even release free map packs periodically.
Unfortunately this has been lost on most producers and developers and now it’s just another way to milk every last cent from gamers. Don’t get me wrong, sometimes DLC is awesome and some developers pour their heart and soul into making awesome new map packs, weapons and even story additions. Too often however, DLC seems like nothing more than a cash grab.