A large city located somewhere in the Northern Hemisphere. Its real location unknown, it is thought to be somewhere in Europe, maybe Russia. The climate of this city is temperate, but it can be very cool at times. The main attraction of this city is a building known as the Citadel, a building which reaches a couple miles. Usually, this building has a blue tint to it.
Not long ago, City 17 was taken over by the Combine army and Civil Protection, causing mass rioting, and freedom fighters to come about. Of these freedom fighters, the most well known are Gordan Freeman and Alyx Vance.
I was going to take a train to City 17, but the Combine Forces shut down all railways.