An indoor arena under a black ceiling: bare concrete rooms lit by hanging warehouse lamps, chest-high partition walls and wooden crates stacked for cover. One frame overlooks the maze of low walls from the top of a crate; the others walk the halls between the plaster partitions. Despite the cs_ prefix there are no hostages here — the map plays as a fight-yard arena with gear waiting on the floor.

The hall is small: 2624 × 1184 × 528 units, drawn with 851 faces and 23 textures, a fraction of any stock map. Fifteen spawns per side seat thirty players. Grenades, flashbangs and six kevlar-and-helmet kits lie on the floor, equip entities hand out gear at spawn, and both teams still get buy zones. Two ladders and two illusionary props round out the geometry; the archive ships the .bsp alone.