Half-Life 2: Episode One is a first-person shooter video game, the first in a series of episodes that serve as the sequel for the 2004 Half-Life 2. It was developed by Valve Corporation and ...

Half-Life 2 is now free to own until November 18 as part of the game's 20th Anniversary update. Episode One and Two have also been merged into Half-Life 2 for easier access, while Steam Workshop ...