This article describes the Half-Life 2: Episode Two storyline, chapter by chapter. Continuing the plot of Half-Life 2 and Episode One, Episode Two consists of seven chapters telling the story of Gordon Freeman and Alyx Vance's journey through the Outlands to a large Resistance base named after the forest. After the destruction of the Citadel, the Combine are working to open a massive superportal to call for reinforcements. Combine Advisor pods have been scattered throughout the region. The destruction of the Citadel, as explained by Dr. Kleiner's broadcast in Episode One, has inflicted a portal and communications blackout on Earth-stationed Combine forces, leaving them isolated and disorganized. A crucial part of the plot is the transmission packet which the Combine sacrificed the Citadel