Half-Life 2: Game of the Year Edition - PC Realistic physics: objects have varied and appropriate mass, density, physical properties Sequel to the hit first-person shooter Scientist-with-a-crowbar Gordon Freeman joins a ragtag human resistance fighting extradimensional invaders for the survival of a conquered Earth Unnervingly realistic graphics the likes of which have not been witnessed outside of a motion picture or pre-rendered cut scene Special Edition includes Half-Life 2, Counter-Strike: Source, plus Half-Life 2: Deathmatch and Half-Life: Source.