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,

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

Valve has issued a 20th anniversary update for Half-Life 2, and the game is now available for free through November 18. The other titles in the Half-Life series are all on sale, with deep discounts, and there’s a new two-hour documentary about the making of the game.

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.

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,