The film also reveals that Episode 3 was planned to feature an arctic environment, ice gun, and some annoying blob enemies. Gabe Newell called Episode 3's cancellation his own "personal failure." Valve has shared some Half-Life 2: Episode 3 footage for the first time ever.

In a new two-hour documentary from Valve, current and former members of the company talk openly about the creation of Half-Life 2 as well as finally spilling the beans on what happened to Episode 3, and even showing gameplay of early prototypes of the canceled game.

It’s Half-Life 2’s 20th anniversary, and in celebration, Valve has released a special update that adds the Episode One and Episode Two expansions to the base game so you can play it all straight through,

This celebration comes almost exactly a year after the original Half-Life received a similar update and documentary. For Half-Life 2, Valve has integrated its two expansions, Episode One and Episode Two,

Half-Life: Episode 3 remains one of the great what-ifs in gaming history. Now, on the occasion of Half-Life 2's 20th anniversary, Valve has opened up about its development in a brand-new documentary that shows never-before-seen work-in-progress footage,