Mysterious new Half-Life app appears on Steam before 25th anniversary

Half-Life suddenly becomes a free game, but then Valve changes that, and then a new, mystery Half-Life app appears on Steam out of nowhere.

News - Platform - Half Life 25th Anniversary Update: Game gets new mini-campaign, 100% off until November 20, Now Steam Deck Verified (Documentary Released)

Half-Life Steam Deck Steam OS - Steam Deck Gameplay Half-Life

Franchise - Half-Life

Half-Life Is Free-to-Play on Its 25th Anniversary With New Updates and Steam Deck Verification

Half-Life 2 is looking great with the most recent update! : r/HalfLife

Half-Life gets 25th Anniversary Update with restored content, new maps, more

Valve's Half-Life 25th Anniversary Update now live, game is also free to claim on Steam - Neowin

Mysterious new Half-Life app appears on Steam before 25th anniversary

Valve celebrates 25 years of Half-Life with feature-packed Steam update

How Valve Finally Fixed a Half-Life Bug That's Almost as Old as the Game Itself - IGN