At this point it seems like a sequel explaining what happened at the end of Episode 2 will never happen. From there fans have gotten rumors, leaked concepts, and even an unofficial synopsis from a lead writer. Valve continued to talk about the game for several years, but never gave any indication as to when it would release. Half Life 2: Episode 3 was going to release in 2007, but due to unknown reasons was delayed indefinitely. There have been many rumors over the years that a sequel to Half-Life 2: Episode 2 would be entering development.
Finally the company has decided to explain their reasoning behind not creating a sequel, and it is incredibly frustrating. Over the last 13 years people have waited for Valve to further develop the story, but their cries have seemed to fall on deaf ears. Fans of Half-Life 2 have been clamoring for a sequel to explain the cliffhanger at the end of Half-Life 2: Episode 2.
