An oldie but a goodie. Haven't played it yet although I hear good things.
Half-Life 2: The Orange Box Contains: Half-Life 2, Half-Life 2: Episode One,
Half-Life 2: Episode Two, Team Fortress 2 and Portal.
Half Life 2: The first instalment in Valve's world-renowned Half Life 2, the sequel to the multi award-winning PC legend Half Life!