@Darkfiber: Yes, I must agree. I just said it was an added feature which contributed to the popularity, there by helping it ( indirectly ) sell in big figures.
I agree, albeit partially. Theater mode is like the add-on feature which makes it good. As you say, of course - a FPS game is no good without the usual mechanics, but the theater mode is just this added bonus!
@Darkfiber: Yes, I must agree. I just said it was an added feature which contributed to the popularity, there by helping it ( indirectly ) sell in big figures.