The Citadelum 2.0 update is a free overhaul to the Ancient Rome city builder packed with new resources, buildings, tech, and features.

Early builds of Valve's Half-Life 2 originally spent far more time in the sewers, so much so that it led straight back to the Citadel.

In the finished Half-Life 2, there's a section where Gordon and Alyx are fighting through City 17 trying to reach Barney, and come to a destroyed bridge. You end up dropping down to the canal before a ...