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.

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,

Valve has put out a comprehensive changelog on the Half-Life 2 Steam page, but here is an abridged list of what is new on this good old game. Additional Content . The biggest news