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.

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.

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 gets a 20th Anniversary update that bundles the Episodes and Lost Coast into the main game while making several across-the-board additions and improvements to in-game visuals, though not to the level of a full port to a new engine.

Half-Life 2 has been given a major update for its 20th anniversary, making it temporarily free to own, giving it built in mod support, and more.