From the review:
"The Call of Duty franchise charges ahead with new DLC for Black Ops. Five new maps (one of them full of ZOMBIES!) are available for a number of modes; each map has a lot of advantages and disadvantages depending on your style of play. A lot of work and planning obviously went into these areas (well most of them) and it shows when you throw down. Let’s take a somewhat high-level look at what First Strike has to offer."