Way back in 2007, before Half-Life: Episode 2 was even released, Doug Lombardi told Eurogamer "I don't think you'll head back to City 17, for sure…not in Episode Three, anyway.” The oppressive, militaristic city already got a lot of screen time in the original Half-Life 2, and since that the towering Citadel is no more after the events of previous HL episodes, it would seem that City 17 has shown us all it has to offer. But what ever happened to the civilian resistance forces, and our good buddy Barney Calhoun? It’s a wonder if HL3 will have the answers, given the fact that Barney isn’t mentioned once in HL: Episode 2.
Probability: 90%. Very little could’ve survived the detonation of the Citadel, and that includes concrete structures. It’s a shame, really – we may never get to hurl empty soda cans at irritable Combine guards again.