Half-Life: Counter Strike This game combines all the elements of the Half-Life online universe, with new single and multiplayer content Start things off with Counter-Strike -- the intense multiplayer gaming experience where you can be either a soldier or terrorist In Team Fortress, you can select new character classes -- Medic, Sniper, Engineer and 6 other important roles -- for a unique new form of onlin team warfare Opposing Force Multiplayer brings in new maps like Black Mesa, plus new weapons and player characters Also includes exciting new game modes and new firearms for a more complete gaming experience!