Half-Life 2 celebrated its 20th Anniversary with a comprehensive update on Steam, introducing free content including elements from the Lost Coast expansion and Episodes One and Two until November 18. The Orange Box bundle, which includes these titles along with Portal and Team Fortress 2, is available for .99 until November 22. Most mod support for Half-Life 2 is now integrated into the main game, and standalone store pages for expansions have been delisted. The update features a complete visual overhaul, enhancing graphics to match Lost Coast's fidelity, and introduces a new High Quality mode for improved model rendering and shadow effects. User interface improvements include compatibility with modern controllers and three and a half hours of developer commentary added to Half-Life 2.