CelebratingHalf-Life 2s20th anniversary, Valve recently released a documentary detailing the legendary first-person shooters development (in addition to giving the game away for free for a limited period). During that documentary, the company also showcases glimpses of a project that was highly anticipated, but never saw the light of day- that, of course, beingHalf-Life 2: Episode 3.In the documentary, Valve has also revealed completely new and previously unseen footage of the cancelled project. It showcases a new enemy blob-shaped shapeshifting enemy type that could move through grates or split up into smaller versions of itself. Also shown off as a new weapon called the Ice Gun, which did exactly what its name suggested.In the documentary, members ofEpisode 3sdevelopment team reveal that Valve had developed multiple levels of the game, before the project was put on hold so that the development team could help wrap upLeft 4 Deadsdevelopment. By the time that was done, however, it was decided by Valve leadership (including Gabe Newell) that it was too late to return toHalf-Life 2: Episode 3.You can view the full documentary below.