Half-Life 2 is a science fiction first-person shooter computer game and the sequel to the highly acclaimed Half-Life. It was developed by Valve Corporation and was released on November 16, 2004, following a protracted five-year,[6] $40 million[7] development cycle during which the game’s source code was leaked to the Internet.[8] The game uses the Source game engine, which includes a heavily modified version of the Havok physics engine and was also the first video game to require online product activation.[9][10] Originally available only for Windows-based personal computers, the game has since been ported to the Xbox and Mac OS X. The game was a part of The Orange Box compilation for Xbox 360 and PlayStation 3 video game consoles.[11]
http://www.halflife2.net
http://www.halflife2.net