Never-Before-Seen Half-Life 2: Episode 3 Gameplay Footage and Ice Gun Revealed in New Documentary

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, a brand-new Ice Gun, and a raft of new concept art.