An interior with no sky at all, built from plain painted walls and bare concrete ceilings. One frame stands in a hall where the walls are split horizontally into orange and white, a steel rolling shutter in one of them, a red sofa left against the wall and a security door at the far end. Another is a computer room: rows of monitors and towers on grey concrete tables, wooden crates used as stools, the lower half of the walls painted blue and fluorescent tubes hanging on rods from the ceiling. A third is an empty office with two windows and an L-shaped reception counter with a single monitor on it.

The footprint is only 2584 × 1384 map units with a 624 unit ceiling, so this is a tight building with short sightlines. Sixteen spawns per side seat 32 players, which is a great many for a space this size. Four hostages and one rescue zone set the objective, there are no bomb sites, and the map has no buy zones of its own, so the engine places buying at the spawns. Geometry comes to 3,548 faces and 81 textures, all embedded in the .bsp, next to 3,206 faces and 182 textures in cs_assault. The entity list is short: four scientists standing among the hostage models, three doors, two breakable objects, one ladder and one ambient sound source. The archive holds nothing but the .bsp.