The sequel to Call of Duty 4: Modern Warfare, brings similar single player action. Infinity Ward got highly criticised for removing dedicated servers support in multiplayer, along with several other features, including lean and record feature.
ESRB - Adults Only 18+: Titles rated AO (Adults Only) have content that should only be played by persons 18 years and older. Titles in this category may include prolonged scenes of intense violence and/or graphic sexual content and nudity.
