Ruins was first released at the same time as Military Base with a common door mechanic. As Military Base's armored door works with switches, this map's two doors function with proximity mouvements just like in Bio Facility. It is a symmetrical map with a couple of crates and a long wall seperating both sides. Both parties spawn within some dark tombs with two exits, then head over any of the doors for a massive fight. A crack in the wall can be used for throwing grenades, but may also be access by jumping it from some crates.