How many times have you completed IGI 1 & 2.....?

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I really like this game ..and as a matter of fact, I like all the shooting games.. I have completed IGI 1 and 2 , five times each, and while playing the 2nd part, I did not know, that there was an option for save games, and I completed it without using the save option ,when I played it for the first time, and after all the steges were exposed, I noticed, there was a load game option, and then I knew, there was a save option. What about you..?