Sub Pens is a multiplayer map that was released, in Map Pack 2 for Call of Duty: World at War, on June 11, 2009. Sub Pens is a small map, set in a bombed out submarine base, with two sides separated by two Japanese float planes which are positioned in the center. There are several flanking routes, and plenty of cover throughout. Because of this, almost any playstyle can be used effectively. However, it can be difficult to use a sniper rifle, as the map mainly consists of close quarters fighting, and there are few elevated positions which are useful for sniping - effective sniping can only be accomplished if teammates support these few areas with automatic weapons.