The Counter-Strike map identified by the filename cs_assault is Assault.
Assault is a hostage-rescue map in which Counter-Terrorists attempt to rescue hostages held inside an industrial warehouse. Terrorists defend the building, while Counter-Terrorists begin outside and must enter through several approaches. Its visual design includes shipping containers, ventilation routes, a warehouse interior, and an elevated exterior area.
Map filenames in Counter-Strike use prefixes to identify the scenario type. The “cs_” prefix indicates a hostage-rescue map, while “de_” identifies a bomb-defusal map. Thus, cs_assault is the file-style name for Assault, just as cs_office identifies Office.
Assault is sometimes confused with Office because both are classic hostage-rescue maps. Their layouts and settings differ: Assault centers on a warehouse complex, whereas Office depicts an office building. The map appeared in early Counter-Strike releases and became one of the series’ recognizable classic maps.