Sierra Studios, Gearbox, and Valve proudly introduce Half-Life: Adrenaline Pack, the definitive collection of Half-Life universe games. Half-Life: Adrenaline Pack contains Half-Life Game of the Year Edition, the award winning game that has been named "Game of the Year" by over 45 publications, Half-Life: Opposing Force, the critically acclaimed mission pack for Half-Life and Team Fortress Classic, the number one online multiplayer game. Half-Life: Adrenaline is a must have for anyone who hasn't experienced the undisputed Game of the Year. As an added bonus, Half-Life: Adrenaline Pack also contains a Sierra Studios Trial CD that features playable demos of hit games like Homeworld, Pharaoh and Swat 3.