The Pack is called Day Of Defeat but contains Counter-Strike, Team Fortress Classic, Day of Defeat, Deathmatch Classic, Half-Life: Opposing Force, Ricochet, Half-Life, Half-Life Blue Shift and also grants acess to the Half-Life SDK tool
more details hereand it is a Steam KEY
The Pack is called Day Of Defeat but contains Counter-Strike, Team Fortress Classic, Day of Defeat, Deathmatch Classic, Half-Life: Opposing Force, Ricochet, Half-Life, Half-Life Blue Shift and also grants acess to the Half-Life SDK tool
more details here and it is a Steam KEY