Twenty years ago this month, Valve released Half-Life 2. The company is celebrating the anniversary with a 20th anniversary update that includes new content and various bug fixes. Best of all, Half-Life 2 is free right now on Steam, but only until 1 PM ET today, November 18.

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,

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 2 is getting a major update in celebration of the classic title’s 20th anniversary. In addition to Steam Workshop support directly within the game, Valve has fixed bugs and restored some content,

Valve has shared some Half-Life 2: Episode 3 footage for the first time ever. The company did so as part of a new documentary that also revealed some other details about what was planned for Half-Life 2: Episode 3 before its cancellation.

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,