Half-Life 2

Half-Life 2 is a first-person shooter computer game and the highly anticipated sequel to Half-Life, developed by Valve Software. It was released on November 16, 2004 to very positive reviews {{ref|reviews}}, following a protracted five-year development cycle during which the game's source code was leaked to the internet. The game utilizes the advanced Source game engine, coupled with a heavily modified version of the Havok physics engine, and was critically acclaimed for ground-breaking improvements in computer animation, computer graphics, artificial intelligence (AI) and physics. Since its release, the game has sold about 3 million copies so far {{ref|sales}}.

Further reading

• Half-Life 2 controversies and criticisms