I think I am the only person left that hasen't played the orginal Half life. I bought the retail version of HL2 that came with Counter Strike and HL2 Death match but not HLS. Is there a way to buy it? When I try to buy it on steam its says I already own a copy of HL2 ( I know that already ) When I go to the play games icon it says to buy HLS click here, when I click it says You aready own HL2??????