Wivenhoe is a prelude to the events of Half-Life 2 and explains various events and locations from within the game itself. The player takes part in a coordinated civilian uprising to prevent the shelling of Ravenholm, the last bastion held by the civilians in City 17. Wivenhoe is a Combine-controlled dam facility upriver from City 17 and the environments consist of the spillway, dam wall, indoor facility and a bridge across the ravine. These environments incorporate stealth, action and horror gameplay.