I would maybe play it out of morbid curiosity but I wouldn't spend any money on it.
I find this to be very sick. Well, yes, it is inevitable that movies and maybe games would based off this event, it shouldn't be this soon. Its only been a year and a half since 9/11. Its still far too close to have a game based off it.
I dunno if I would play it as it took me a while to get over this event and it hit home closer to me as my sister used to work in a building that was just across the street. luckly she moved some months to Arizona before 9/11 happened but still...