Half Life 2: Extinction Mod for Half-Life 2 Addons

Half Life 2:Extinction tells the story between Half life 1 and Half life 2 in a fictional way. You play as Rob Rentrix, a rebel soldier, who has just survived the 7 hour war. Your task is to get out of the city and into the forest surrounding the city. This mod is just Chapter 1 in a 3 Chapter storyline i made once. It includes city 17, the forest around the city and a gigantic starship from the combine overwatch.