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,

To celebrate the game’s 20th anniversary, Valve is offering Half-Life 2 for free until November 18th with additional content including developer commentary mode, improved graphics, and more.

Valve is honoring the 20th anniversary of Half-Life 2 with a celebration that includes a brand-new two-hour documentary, a developer commentary update, and more.

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.

Just like it did with the original Half-Life last year – celebrating the seminal first-person shooter’s 25th anniversary with a major update, a documentary, and a 100% off sale – Valve is celebrating the arguably even more influential Half-Life 2 ’s 20th anniversary with,

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,