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.

There's graphics updates. There's incorporation of episodes. There's every thing your little Half-Life heart desires (except for a new game).

Among the details shown in the video, Episode 3 would have been set in the Arctic, and it would have focused on Alyx as a companion character. Aside from the Ice Gun, the footage

Half-Life 2 is officially 20 years old this weekend, and to mark the occasion Valve has released a special anniversary update, bundling in a brand-new documentary, commentary, the previously separate Episodes 1 & 2,