I've been playing the FO series for years & have never been aware there was any time limit in playing FO 2 to get to the Enclave. Well of course it would be reasonable that there is. I was taking my time in my most recent replay of FO 2 & trying to get all the "encounters" (specifically I was PO'd that I was not able to come across the Holy Grenade encounter with that wonderful little rat - having encountered the Knights some time previously) when suddenly the screen went blank & the picture of a tremendous explosion was shown together with the final words "The End." Then the main menu was shown. Whoa! I've never seen this talked about in any of the walkthroughs, including Per Jorner's (of course, that dosn't mean it hasn't been - I just don't remember it). Well, I've been to the Enclave so many times it's no big deal anymore. I just play the game now & then to experiment with it. But though the time limit is not that much of a factor in FO 2 as it is in FO 1, it's obvious that the exploration I was doing should be left to after visitng the Enclave - when there is no time limit period.