What just happened? Valve is celebrating Half-Life 2's 20th anniversary with a massive update, a temporary free giveaway of the full game, and a bundle including the two episodic expansions and new developer commentary. Additionally, a two-hour YouTube documentary sheds light on the canceled third expansion, revealing new details for fans. If you're one of the few Steam users who still doesn't own Half-Life 2, now is your chance to add Valve's blockbuster first-person shooter to your library permanently for free until November 18. The bundle also includes both follow-up episodes, plus the game has received a major update in celebration of its 20th anniversary.The patch doesn't overhaul the game's graphics to the extent of the upcoming RTX Remix mod, but it brings dozens of bug fixes, minor enhancements, and new features.Newly added Steam Workshop support makes it easier for players to discover and install the countless mods created for Half-Life 2 over the years. Players can now select the "Lost Coast" chapter directly from the game's main menu, and the developer commentary feature previously introduced in the episodic expansions is now integrated into the base game, with three and a half hours of new audio.The update also revises visual elements like lighting, grass, HDR effects, and draw distances. Additionally, menus and the HUD add support for various ultrawide aspect ratios and gamepad configurations. For those seeking nostalgia, players can toggle the lighting and effects from the game's original 2004 release.Meanwhile, Valve has released hours of archival footage on YouTube chronicling the development of Half-Life 2 and its episodes. Among the topics covered, the canceled Episode 3 is likely to be the most intriguing for fans. The documentary provides the first official details on the expansion in years.Through new footage and concept art, Valve reveals that Episode 3 would have largely taken place in the Arctic and introduced an ice gun. The developers confessed they could have easily shipped Episode 3 but ultimately didn't due to a lack of fresh ideas that could meet the company's quality standards. However, a group of fans is currently developing a free campaign inspired by a draft of Episode 3's plot, which series writer Marc Laidlaw published in 2017. // Related StoriesOther new videos include demonstrations from Siggraph 2000, E3 2002, and E3 2003. Valve also announced an expanded reprint of Raising the Bar, the book documenting Half-Life 2's development, which has been out of print since 2004. The second edition includes newly uncovered concept art from the three episodes.In tandem with Valve's celebrations, Nvidia has joined the festivities by unveiling a custom Half-Life 2-themed GeForce RTX 4080 Super graphics card. This GPU is designed to showcase the upcoming RTX Remix mod, which will add real-time path tracing and updated textures to the game. Fans can enter a contest on Nvidia's website to win the card, and the upcoming mod now has its own Steam page.