My pick is Stanley Kubrick's 1968 masterpiece, 2001: A Space Odyssey.
Also Sprach Zarathustra by Richard Strauss will forever be one of cinema's greatest opening themes. And combined with the opening credits of the movie with the sun rising slowly over the Earth was absolutely groundbreaking and legendary. It is truly one of the greatest opening credits sequences of all time.
Yes, it came out on the 29th of August on Steam and Epic. It will release on PlayStation 5 and Xbox Series X/S this Fall.