Valve's Robin Walker announced in an interview with ComputerAndVideoGames that Valve has been working on a second expansion for Half-Life 2 for quite some time now. Walker, who's a designer at Valve, refused however, to go deeper into the subject.

Fortunately he gave away some juicy new details about the upcoming expansion, Half-Life 2: Episode One (formerly known as Aftermath), thus completely redeeming himself. He stated that it will take an estimated four to six hours to complete the game and that it will provide an answer to some very crucial questions that were left unresolved in the original game.

Half-Life 2: Episode One is due for release on April 28th.

In other news: