Killhouse is a DLC-added map from Call of Duty 4: Modern Warfare.
This map is set in the place where you start out from at the very beginning of the campaign. It's the same idea. It is a very small map, featuring labyrinth-like passages on the sidelines, a big tower in the middle of the map that can provide a much needed vantage point and small bases on both sides of the map. You can climb to the top of the bases and get a nice view of the entire arena but be careful, you are very exposed.
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