Valve Unveils 64-Bit Source Game Engine
Valve released a 64-bit version of its Source game engine technology. The first 64-bit Valve games released will be native 64-bit versions of HALF-LIFE 2 and LOST COAST, and have been developed to take advantage of AMD Athlon 64 FX processor-based systems.
The 64-bit versions of these games are being offered to all HALF-LIFE 2 owners via Steam, Valve's online platform for delivering games and digital content directly to users around the world.