For those who have this game, 1. is condition zero better than the regular counter strike? And also, 2. if I purchase condition zero, could I play with people who have regular counter strike in a multiplayer game through online? And, 3. do I need the regular counter strike to play condition zero, by that I mean, is condition zero an expansion that requires regular counter strike to play it? Please answer all of the questions. There are three questions, I have numbered them for you. thanks a bunch.