While the core experience in Call of Duty: Black Ops is similar to the more recent entries in the series, including Modern Warfare 2 and World at War, there are a variety of new features introduced in the new game you might want to know about. The following primer will get you up to speed on some key features in Black Ops including the new setting, weapons, the developer, and multiplayer modes. When you're ready, we've got an in-depth review of Black Ops that provides our judgment on all of the facets listed below.