A prison at night, under a green full moon in a sky of torn black cloud. One frame stands on the road in front of the main gate, where a lit board reads Harlem State Penitentiary and a low building of grey stone block carries a pediment over an arcaded porch, barred windows above it and two bare shrubs in front. Another looks into a walled yard: concrete parapets, mesh grilles set into the wall at head height and wooden crates left on a ledge. Inside, the camera passes a reception of low partitions and metal lockers with narrow lit strips along the top of the walls, then a tall hall of grey block where a raised platform with a framed sign stands against the far wall and a wooden counter runs down the right side.

The map measures 5248 × 5952 × 1056 units. Its geometry comes to 7,481 faces on 51 textures, 16 of them packed into the .bsp, where de_dust2 has 5,383 faces on 44. Both sides get 5 spawn points, so a round starts with up to 10 players. Despite the cs_ prefix there are no hostages, no rescue zones and no bomb sites; buy zones are set to auto, so the engine places them at the spawns. The map holds 11 entities in all, which leaves no doors, ladders or breakable objects to work with. The sky is the fullmoon set and there is water in the map. Alongside the .bsp the archive installs a radar overview.