Just about 15 months ago, the world finally found out what Valve Software had been working on since the release of Half-Life on the PC in 1998. At E3 2003 Valve announced Half-Life 2, a brand new first person shooter featuring amazing graphics, unique game play and a brand new physics engine that Valve said would revolutionize PC gaming. At this year's E3, Valve showed off the multiplayer portion of Half Life 2, better known as Counter-Strike: Source.
Counter-Strike: Source is essentially the Counter-Strike you know and love ported over to Valve's Source Engine, the engine that Half-Life 2 was built on, as well as the engine that will be used in many games that will be released in the coming months, including Vampire - The Masquerade.
News source: VR-Zone