Task: Question Answering
Input (English): Context: Half-Life 2 (stylized as HLF-LIFE) is a first-person shooter video game developed and published by Valve Corporation. The sequel to 1998's "Half-Life", it was released in November 2004, following a five-year, $40 million development phase, during which a substantial part of the project was leaked and distributed on the Internet. The game was developed alongside Valve's Steam software and the Source engine., Valve Corporation (commonly referred to as Valve) is an American video game developer and digital distribution company headquartered in Bellevue, Washington. The company is known for the "Half-Life", "Counter-Strike", "Portal", "Day of Defeat", "Team Fortress", and "Left 4 Dead" series, "Dota 2", and its software distribution platform Steam., Half - Life 2 : Capture The Flag ( also known as HL2CTF ) is a multiplayer , team - based capture the flag mod developed around Half - Life 2 . The public beta version was released on February 23 , 2005 . The latest version of the mod was released to the public on December 8 , 2011 . On October 16 , 2013 , Half - Life 2 : Capture The Flag was greenlit on Steam Greenlight ., Subject: half-life 2: capture the flag, Relation: distribution, Options: (A) digital distribution (B) internet (C) steam
Output (English): digital distribution