City 17

City 17 was the grand city in Eastern Europe that was existed since after the Seven Hour War. It was taken over by the Combine, it was became their main headquarters on Earth.

History
150 years ago, City 17 was built by the constructors in 2037 after the announcement of Buy n Large and Omnicorp from 5 years ago, the mysterious military international government, R.O.R.G., which is conquer and civilized City 17 alongside with Buy n Large, Omnicorp, and Aperture Science. TBA